Last updated: May 25, 2026·🔄 Product links checked and unavailable products replaced with current alternatives for 2026.· By Serdar

Halloween Costume Guide

Hanni NewJeans Halloween Costume Guide

Denim Look  ·  Y2K Rhinestones  ·  Round Glasses

Two looks, fifteen items, and a wig that does most of the talking. The fastest way to tell the K-pop crowd who you are.

NewJeans Influencer K-Pop South Korean
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Quick Answer: The Hanni NewJeans Halloween costume comes in two versions built around a few core pieces.
  • Black straight wig and round eyeglasses (essential)
  • Denim jacket over a lace cami with rhinestone detail
  • High-waisted denim shorts, crew socks, Air Jordans
  • Or: bun updo, lightweight cardigan, red leather bag (suit look)

Hanni Pham is a singer and member of NewJeans, the K-pop group that debuted in 2022 with “Attention” and became one of the most-discussed acts of the decade before their label dispute slowed things down. She sings, she fronts Gucci and Armani Beauty campaigns, and she wears a lot of denim. The denim-on-denim Y2K look is what most people picture when they think of her. K-pop fans will know immediately. Everyone else needs one sentence of context.

Items Total15 Items
DifficultyEasy-Medium
VibeY2K K-Pop
Cost$60–$150

Hanni NewJeans Denim Look Halloween Costume Items

Hanni NewJeans Halloween costume infographic showing the denim look with round glasses, black straight wig, long denim jacket, lace cami top, rhinestones, denim shorts, crew socks, and Air Jordan 1 Mid sneakers

Hanni NewJeans Denim Look Costume Items

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Hanni NewJeans K-Pop Y2K Denim
  • 1 Hanni EyeglassesRound frames, central to her OMG-era look. One of the two items that identifies the character. Get these right and the rest of the costume falls into place.
    See on Amazon
  • 2 Black Straight WigThis is the other essential item. Hanni’s signature look is long, straight, black hair. If your own hair is already that length and color, skip it. Otherwise, pin it before you leave. It will shift by hour two without pinning.
    See on Amazon
  • 3 Long Denim JacketGo long, not cropped. The contrast of a long jacket with shorts underneath is a NewJeans styling detail that shows up across their photoshoots. Thrift stores are a good first stop for this one.
    See on Amazon
  • 4 Lace Cami TopGoes under the jacket. White or light-colored. The lace texture stops it reading as a plain tank. You will add rhinestones to this, so get something that can take adhesive.
    See on Amazon
  • 5 Crystals Flatback RhinestonesApply to the cami, the jacket hem, or both. A scattering across the chest reads Y2K immediately. Too many and it tips into pageant territory.
    See on Amazon
  • 6 High Waisted Denim ShortsHigh waist is important for the proportion to work with the long jacket. A lighter wash than the jacket creates contrast and stops the look from reading as one flat color.
    See on Amazon
  • 7 Rhinestone Stickers Self-AdhesiveEasier to apply than loose flatbacks if you do not have a craft setup. Peel-and-stick is more forgiving at a party. Pick one or the other, not both.
    See on Amazon
  • 8 Air Jordan 1 Mid SneakerNewJeans wore Jordans across multiple looks and promotions. Red, white, and black colorway if you can get it. K-pop fans will notice the detail.
    See on Amazon
  • 9 Crew SocksPull them up. The visible sock above the shoe is part of how NewJeans styles their footwear. Striped or white both work. Do not tuck them down.
    See on Amazon

Hanni NewJeans Suit Look Halloween Costume Items

Hanni NewJeans suit look Halloween costume infographic showing bun hair piece, hair extension, lightweight cardigan, white-black fashion sneakers, red leather bag, and dress socks

Hanni NewJeans Suit Look Costume Items

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Hanni NewJeans K-Pop Stage Look Polished
  • 1 Bun Hair PieceThe suit look uses a sleek updo. This clips in and gives you the polished bun shape without needing a full updo skill set. Secure it before you leave. It will shift.
    See on Amazon
  • 2 Hair ExtensionAdds length around the bun for a fuller, more polished result. Matches dark hair. This is a supporting piece for the hairstyle and can be skipped if your own hair gives enough volume already.
    See on Amazon
  • 3 Blend Lightweight CardiganThe main body piece for the suit look. A fitted, structured cardigan in a neutral or light color reads polished without being stiff. This replaces the denim jacket in this version of the costume.
    See on Amazon
  • 4 White-Black Fashion SneakerClean and minimal. The white-and-black colorway keeps the look light. Wear with dress socks pulled slightly visible above the shoe.
    See on Amazon
  • 5 Red Leather BagThe one color pop in the suit look. Small to medium. This keeps the polished outfit from reading as just a cardigan and sneakers. Carry it. Do not set it down.
    See on Amazon
  • 6 Dress SocksWhite or light-colored, worn slightly visible above the shoe line. Same principle as the crew socks in the denim look. It is a small detail but it is consistent across NewJeans styling.
    See on Amazon
Hanni from NewJeans sitting on a brightly lit staircase with bandmates in matching denim outfits, wearing a long denim jacket over a white crop top, denim shorts, striped crew socks, and red, white, and black Air Jordan sneakers with long straight black hair

How to Style the Hanni NewJeans Halloween Costume

The glasses and the wig are what people read first, and they have to be right before anything else matters. A denim jacket without those two items is just a denim jacket. With them, the character is established from across the room. The one thing that goes wrong at parties is the wig shifting forward, which makes the glasses sit wrong on top of it. Pin the wig at the crown before the glasses go on.

Hanni moves with a quiet confidence that does not try too hard. At a party, that means you do not explain yourself unless someone asks. If someone asks, you say “NewJeans” and hum the first four notes of “Hype Boy.” That is usually enough. If it is not, you were at the wrong party anyway.

Apply the Rhinestones Before You Leave Home

Flatback rhinestones need to dry fully before you move around. Apply them the night before or at least two hours ahead. Ones applied too close to departure will drop off in the car. Rhinestone stickers are faster but flatbacks look better in photos if you have the time.

The Socks Stay Up

Crew socks folded down over the shoe look like any other sneaker combination. Pulled up to mid-calf over the ankle is the NewJeans-specific detail. If yours keep sliding down, a small strip of double-sided fashion tape inside the sock cuff fixes it. Low-cut no-show socks are the wrong call entirely.

Hanni NewJeans Group Halloween Costume Ideas

The Bunnies Squad

Hanni, Minji, Danielle, Haerin

This is the strongest option if everyone in the group is a NewJeans fan. The matching Y2K denim aesthetic means you can coordinate without being identical, which is usually what makes a group costume actually work. It reads immediately to K-pop fans. Outside that crowd, you are a group of people in matching denim outfits, which is still a conversation starter.

Hanni (NewJeans) Minji (NewJeans) Danielle (NewJeans) Haerin (NewJeans)

The Y2K Pop Princesses

Hanni, Wonyoung, Britney Spears, Avril Lavigne

Conditional. Britney and Avril are recognizable across age groups, which carries the group’s recognition even for people who do not follow K-pop. Wonyoung is IVE, not NewJeans, so there will be one person all night asking “wait, which one are you?” Decide if that is fine before committing.

Hanni (NewJeans) Wonyoung (IVE) Britney Spears Avril Lavigne

The Harmonious Hannahs

Hanni (NewJeans), Hannah Washington, Hannah Montana, Hannah Baker

The name-based theme is charming in theory. The problem is that “Hannah Montana” and “Hannah Baker from 13 Reasons Why” are very different energies to have in the same photo. It can work if your group likes the absurdist angle. Hannah Washington from Until Dawn is the niche one; most people will not place it. I’d say this group is for parties where explanation is part of the fun.

Hanni (NewJeans) Hannah Washington (Until Dawn) Hannah Montana Hannah Baker (13 Reasons Why)

The Powerpuff Girls Collab

Hanni (NewJeans), Blossom, Bubbles, Buttercup

Niche. This comes from the actual NewJeans x Powerpuff Girls collab content, so there is a real reference behind it. The Powerpuff characters are widely known, but Hanni dressed as Hanni next to Blossom, Bubbles, and Buttercup will confuse anyone who missed that collab. Best at a K-pop or animation-focused event.

Hanni (NewJeans) Blossom (The Powerpuff Girls) Bubbles (The Powerpuff Girls) Buttercup (The Powerpuff Girls)
Hanni from NewJeans performing on stage against a light blue background, sitting on a black prop block with long black hair and blunt bangs, wearing a white short-sleeve top under a dark structured vest and matching dark pants with thigh cut-outs

Hanni NewJeans Halloween Costume DIY Tips

What to Source vs. What You Might Already Own

The wig and the glasses are the two things you need to buy specifically. Everything else has a reasonable chance of already being in your wardrobe or a friend’s. Check your closet before ordering denim pieces, especially the shorts and jacket.

  • Black straight wig: buy it, this is non-negotiable if your hair is not already long and black
  • Round glasses: buy them, they are cheap and specific to the look
  • Long denim jacket: check thrift stores first, this is easy to find secondhand
  • Lace cami: most people own something close enough
  • Denim shorts: high-waisted, check your wardrobe
  • Crew socks: you have these. Pull them up.
  • Air Jordans: if you own a pair in any colorway, use them
  • Rhinestones: buy them, a small pack goes far and costs almost nothing

Playing Hanni Without Saying Much

Hanni’s screen presence is calm, a little playful, and not showy. That is genuinely easy to maintain at a party. You do not need to perform.

  • Know the hook of “Hype Boy” well enough to hum it. That is all you need when someone does not place the costume.
  • Soft smile, not a grin. Hanni does not perform for a reaction.
  • If you go with the denim look, hold the jacket closed at cooler moments. The silhouette reads better that way.
  • Skip character method acting. A wig and round glasses is enough.
  • If you have the NewJeans Fandom wiki pulled up on your phone, you can answer almost any deep-cut fan question from other Bunnies at the party.

Hanni NewJeans Halloween Costume: FAQ

Two looks to choose from. The denim look: round eyeglasses, a black straight wig, a long denim jacket, a lace cami top with rhinestone detail, high-waisted denim shorts, crew socks pulled up, and Air Jordan 1 Mids. The suit look: a bun hair piece with hair extension, a lightweight cardigan, white-black fashion sneakers, a red leather bag, and dress socks. The wig and glasses are the most essential items for recognition in the denim version.

Hanni is a performer, not a scripted character, so there are no iconic fictional lines. She is known for her stage presence, her multilingual background, and her personality in fan interactions. At a party, referencing NewJeans songs by name lands better than trying to quote a line. Hum “Hype Boy” or say “Attention” and most K-pop fans in the room will know immediately.

Among K-pop fans, recognition is high, and NewJeans stayed in entertainment news well beyond the fandom due to their very public label dispute in 2024 and 2025. Hanni returned to ADOR at the end of 2025 and the group is preparing a comeback, so this is a costume with current news behind it. Outside K-pop circles, the Y2K denim look reads as a specific aesthetic even without knowing who Hanni is.

One is enough. The denim jacket look is more recognizable for a casual party setting. The suit look is better if you’re going somewhere with an audience that follows K-pop closely. Pick the one that fits your event and your budget.

If your hair is already long, straight, and dark black, skip it. Hanni’s denim look centers on long straight black hair. If yours is significantly different in length, color, or texture, get the wig. The glasses help, but the full silhouette is what makes the character read from across a room.

Hanni Pham is a Vietnamese-Australian singer who debuted as a member of K-pop group NewJeans under ADOR in July 2022. Born in Melbourne, Australia to Vietnamese parents, she is known for her multilingual skills and is a main vocalist in the group. NewJeans broke through quickly with “Attention,” “Hype Boy,” and “OMG,” becoming one of the most-discussed K-pop acts of 2022 and 2023.