15 Brat Halloween Costume Ideas (Charli XCX Looks)
Halloween is the one night of the year when going full brat is basically required. Charli XCX turned being messy, unbothered, and a little chaotic into a full-blown cultural moment – smudged eyeliner, tiny sunglasses, slept-in hair, and that don’t-care attitude – which makes it one of the easiest last-minute Halloween costumes you can pull together.
Most of these ideas come straight from your own closet, cost almost nothing, and take under an hour to assemble. Whether you want to channel a specific Charli look or just capture the vibe, start with our guide to the brat aesthetic. Print your design assets from our tool
The Brat Costume Formula
Every great brat costume follows the same simple formula: a black base, one chaotic detail, and the right attitude. Charli’s whole look is built on the idea that you didn’t try too hard – even when you clearly did.
Start with basics you already own: an oversized tee or a tiny tank, low-rise jeans or a mini skirt, and boots or beat-up sneakers. The chaos comes from the styling: sunglasses worn indoors, hair that looks slept-in on purpose, and eyeliner that is smudged, not sharp.
The attitude is what actually sells it. Brat energy is confident, a little messy, and completely unbothered.
Walk in like you own the party, dance like nobody is filming, and commit to the bit all night. Nail the formula first and every idea below will read instantly.
15 Costume Ideas
All fifteen are easy, mostly closet-based, and inspired by Charli XCX’s most iconic looks:
- The “brat” Album Cover – Wear all black and recreate the lime-green cover with a poster board or a phone filter. The easiest costume on this list.
- Von Dutch Era – A trucker hat, a tiny top, and low-rise jeans channel Charli’s Y2K trashy-glam phase. Add a lollipop and you’re done.
- Vroom Vroom Racer – A black leather jacket, dark sunglasses, and slicked-back hair for the high-octane “Vroom Vroom” video look.
- Boom Clap Pop Star – A white tank top, denim cutoffs, and sneakers. Her most recognizable single outfit, almost entirely from your closet.
- 360 Video Look – Head-to-toe black with a messy high bun and chunky boots, straight out of the “360” video’s it-girl lineup.
- Girl, So Confusing – Grab your best friend, dress in clashing outfits, and spend the night dramatically reconciling. Bonus points for matching sunglasses.
- Apple Girl – Wear all green, carry a red apple as a prop, and quote the lyrics all night. Simple, funny, and instantly gettable.
- Guess Girl – Underwear as outerwear layered over black tights with an oversized tee. The “Guess” single artwork come to life.
- Club Classic – A black slip dress, boots, and a tiny bag. The uniform of every brat night out, and you probably own all of it already.
- 365 Party Girl – A mini skirt, a cropped top, and platform boots with your hair half-up. Made for dancing until 3 a.m.
- Mean Girls Lyric Tee – A white tee with the words “mean girls” written in marker, ripped jeans, and an attitude to match.
- Spring Breakers – A bikini top under an open flannel, jean shorts, and a pink ski mask for Charli’s chaotic Harmony Korine era.
- Oversized Blazer – A borrowed blazer over bike shorts and heels. “I might say something stupid” energy in outfit form.
- Everything Is Romantic – A floaty dress with deliberately ripped tights and combat boots. Romance, but make it brat.
- Y2K Tracksuit – A velour tracksuit, hoop earrings, and a flip phone for the throwback Charli XCX look.
Makeup & Hair
Keep it messy on purpose. Smudge black eyeliner along your lower lash line and don’t blend it too neatly – the goal is last night’s makeup, not a tutorial.
Skin should look dewy and real, with a nude or brown lip and barely-there blush. For hair, think bedhead: loose waves, a claw clip holding up half of it, or a slicked-back bun with pieces falling out. The whole point is looking like you had more fun than sleep.
Accessories
Tiny sunglasses are non-negotiable, even after dark. Add a chunky belt, a baguette bag or mini backpack, layered silver jewelry, and a few stick-on tattoos for good measure.
A flip phone or an old MP3 player as a prop completes the Y2K illusion. And if you want to document the night properly, turn your costume photos into shareable jokes with these meme templates.
Group Costume Ideas
Going as a group? Have everyone pick a different Charli era – one “Vroom Vroom,” one “360,” one lime-green album cover – and arrive as the full discography.
Or go as the brat meme itself: print your favorite captions on green poster boards and wear them. For caption inspiration, these brat meme ideas will keep your whole group laughing all night.
That’s the beauty of a brat Halloween costume: it rewards you for raiding your closet and refusing to overthink it. Pick your era, smudge your eyeliner, and go have the messiest, most fun night of the year. Brat summer may be over, but brat Halloween is forever.
How do I dress as brat for Halloween?
Start with a black base – an oversized tee, a tiny top, low-rise jeans, or a mini skirt – then add one chaotic detail like tiny sunglasses or smudged eyeliner. Most of the costume ideas in this guide come straight from your closet, so you can get dressed in under an hour. The real secret is the attitude: confident, messy, and unbothered.
What do I need for the costume?
The basics are simple: black clothing, chunky boots or sneakers, sunglasses, and black eyeliner. From there you can add era-specific props like a trucker hat, a red apple, or a flip phone. Nothing on this list requires sewing, crafting, or special shopping.
Can I do it on a budget?
Absolutely – that is the whole point of a brat costume. Every idea here is built around clothes you already own, plus drugstore eyeliner and sunglasses. If you spend anything at all, it will probably be under ten dollars.
What makeup works?
Smudged black eyeliner on the lower lash line, dewy natural skin, and a nude or brown lip. Keep it intentionally messy – the goal is last night’s makeup, not a polished tutorial look. Finish with bedhead hair or a half-up claw clip.
