Celebrity Stars' Halloween-Worthy Looks Dressing up like a celeb? See the outrageous outfits of Katy Perry, Nicki Minaj and more and tell us which one you'd wear Oct. 31! By People Staff Published on October 11, 2011 06:00 PM Share Tweet Pin Email Trending Videos 01 of 06 KATY PERRY PictureGroup (3); The California Gurl ditched her retro pinup look for futuristic – and sometimes comical – getups this year. From her space-age "Alien" costume to the nerd-girl chic of "Last Friday Night" to her geometric MTV Video Music Awards outfit, Perry always keeps us guessing. 02 of 06 NICKI MINAJ Pacific Coast News; Jemal Countess/Getty; Steve Granitz/WireImage The "Super Bass" singer knows how to amp up the drama! She tops her bright geometric-print jumpsuit with a sky-high angular pink wig (pretty much the only time she's matched), dons a colorful plastic outfit and animal-print boots for a GMA performance, and hit the VMAs Harajuku-style, complete with a face mask and stuffed tail. 03 of 06 LADY GAGA Splash News Online; Xposure; Wireimage Gaga, ooh-la-la! Little Monsters have their pick of Lady Gaga getups this Halloween. The singer steps out in her signature sky-high red platforms, is spot-on as a polka dot – and famously dresses in drag as "Joe Calderone" for her "You + I" video – even staying in character as her male alter ego at the MTV VMAs. 04 of 06 KE$HA INF; Bauer-Griffin; Splash News Online The glitter-loving singer adheres to a trashy-chic look (she even once wore a garbage bag), first pairing mud-crusted boots with a fluffy coat, then taking the stage in a shredded American-flag shirt and tights, and finally stepping out in London in a sparkling skeleton bodysuit. 05 of 06 CEE LO GREEN Frank Micelotta/Getty; Arnold Turner/WireImage; Vince Bucci/PictureGroup The "F– You" singer is anything but forgettable – just check out his outrageous stage outfits! From his gold robe to his feathered outfit – complete with gladiator-style breastplate – to his sparkly jacket and headpiece, Green's ensembles leave us spellbound! 06 of 06 NICOLE "SNOOKI" POLIZZI Robert PItts/Landov; Splash News Online; Jason Kempin/Getty The pouf is so last season. Anyone wanting to emulate the Jersey Shore troublemaker needs to update their look – and Polizzi provides plenty of inspiration. Would-be Snookis can copy her metallic leopard-print skirt (complete with "Brunette Mafia" top), her jean short-shorts (with her ever-present fluffy boots and shades), or her go-to party look, a hair bow and super-short cocktail dress.