Pictures: Celebrity costume parties

Bill Murray as Jimi Hendrix  (Photo by Kevin Mazur/Getty)

Bridget Marquardt  (Photo by David Becker/WireImage)

Will Ferrell speaks at the ‘Megamind’  (Photo by John Shearer/Getty Images)

Katy Perry  (Photo by Kevin Mazur/Getty)

Katy Perry  (Photo by Kevin Mazur/Getty)

Chelsea Handler  (Photo by Kevin Winter/Getty Images)

Quentin Tarantino  (Photo by Alexandra Wyman/WireImage)

Miley Cyrus  (Photo by Stephen J. Cohen/WireImage)

Designer Katie Price  (Photo by Mike Marsland/Getty)

Adrianne Curry  (Photo by Gustavo Caballero/Getty Images)

La Toya Jackson  (Photo by Jean Baptiste Lacroix/WireImage)

Perez Hilton  (Photo by Alexandra Wyman/WireImage)

Perry Farrell  (Photo by Jay West/WireImage)

Ben Lyons  (Photo by Alexandra Wyman/WireImage)

Rihanna  (Photo by Billy Ingram/WireImage)

Jessica Lowndres  (Photo by Valerie Macon/Getty Images)

Whoopi Goldberg  (Photo by Neil Mockford/Getty Images)

Pink  (Photo by Dimitrios Kambouris/WireImage)

Paris Hilton  (Photo by Alexandra Wyman/WireImage)

Seal and Heidi Klum  (Photo by Alexandra Wyman/WireImage)

Kimora Lee Simmons and Djimon Hounsou  (Photo by Johnny Nunez/WireImage)

Stacy Keibler and Geoff Stults  (Photo by Alexandra Wyman/WireImage)

Rick Fox and Eliza Dushku  (Photo by Alexandra Wyman/WireImage)

Paris Hilton shows off her jailhouse stripes. We’d argue that this Halloween costume probably has more flair than her actual prison garb.  (Chris Weeks/WireImage)

Supermodel Heidi Klum strikes a signature pose as a very sexy kitten.  (Charley Gallay/Getty Images)

Model Renata Maciel displays her superpowers with this fantasy costume.  (Joe Kohen/WireImage)

Christina Aguilera and husband Jordan Bratman partner to make any patient feel better.  (Denise Truscello/WireImage)

WWE actress Stacy Keibler as Raggedy Ann.  (Jesse Grant/WireImage)

Rapper Eve performs in her Halloween costume -- as the corrections guard any inmate would love.  (Larry Busacca/WireImage)