People.com's Halloween Party

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!

LADY GAGA

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.