Katy Perry & Russell Brand

(Photo by Jason Merritt/Getty Images)

Simon Cowell & Carmen Electra

(Photo by Ben Pruchnie/Getty Images)

Ashton Kutcher and Demi Moore

(Photo by Alberto E. Rodriguez/Getty Images for CDG)

Billy Corgan and Tila Tequila

(Photo by Alberto E. Rodriguez/Getty Images)

Rachel McAdams and Michael Sheen

(Photo by Andreas Rentz/Getty Images)

Mariah Carey and Nick Cannon

(Photo by Jason Merritt/Getty Images)

Evan Rachel Wood and Marilyn Manson

(Photo by Scott Wintrow/Getty Images)

Sandra Bullock and Jesse James

(Photo by Jason Merritt/Getty Images for NAACP)

Avril Lavigne and Brody Jenner

(Photo by Ilya S. Savenok/Getty Images)

Jennifer Lopez and Ben Affleck

(Photo by Kevin Winter/Getty Images)

Anna Nicole Smith & Howard Smith

(JIM RUYMEN/AFP/Getty Images)

Angelina Jolie and Billy Bob Thornton

(Photo by Vince Bucci/Getty Images)

Tom Cruise and Katie Holmes

(Photo by Jason Merritt/Getty Images)

Brigitte Nielsen and rapper Flavor Flav

(Photo by Frank Micelotta/Getty Images)

Hilary Duff and Joel Madden

(Photo by Bryan Bedder/Getty Images for IMG)

Paul McDonald and actress Nikki Reed

(Photo by Jason Merritt/Getty Images)