Even stars want to dress up as celebrities!

One of the hottest costumes in Hollywood this Halloween was none other than Jennifer Lopez, with two A-listers getting decked out as the megastar.

Nicole Richie, 30, channeled the superstar from her "Jenny from the Block" days, clad in a hot pink Juicy Couture jumpsuit, studded boots, giant hoop earrings and equally as large sunglasses. Richie wore her hair slicked back and rocked a ultra-bronzed skin.

"Don't be fooled by the rocks dat we got! HAPPY HALLOWEEN! Love JLo & Hunter S. Thompson," the mom of two tweeted on the way to Kate Hudson's Halloween bash on October 30. (Richie's husband Joel Madden went as Thompson, the author famous for writing The Rum Diary.)

Kelly Osbourne, 27, dressed as a J.Lo from a different, more recent era. She wore one of the singer's signature uber-short sequined mini dresses and a mane of loose, bombshell-inspired waves. Rounding out her ensemble. the star's Fashion Police co-host George Kotsiopoulos dressed up as Lopez's ex, Marc Anthony.

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Watercooler Poll

Which Star Had the Best J.Lo Costume: Nicole Richie or Kelly Osbourne?

Nicole Richie
Kelly Osbourne