Cast of Friends

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Nicole Kidman and Naomi Watts

Photo by: Vince Bucci/Getty Images

Katy Perry and Rihanna

(Photo by Larry Busacca/Getty Images For The Recording Academy)

Jon Favreau and Vince Vaughn

(Photo by George De Sota/Getty Images)

Salma Hayek and Penelope Cruz

(Photo credit should read HECTOR MATA/AFP/Getty Images)

Jennifer Aniston and Courtney Cox

(Photo by Alberto E. Rodriguez/Getty Images)

Brad Pitt and George Clooney

(Photo credit should read ALBERTO PIZZOLI/AFP/Getty Images)

Matt Damon and Ben Affleck

(Photo credit should read HAL GARB/AFP/Getty Images)

Miley Cyrus & Taylor Swift

(Photo by Michael Buckner/Getty Images for AMA)

Kate Hudson and Liv Tyler

(Photo by Stephen Lovekin/Getty Images)

Jessica Biel and Jennifer Garner

(Photo by Kevin Winter/Getty Images)

Tina Fey and Amy Poehler

(Photo by Jason Merritt/Getty Images)

Tobey Maguire and Leonardo DiCaprio

(Photo by Kevork Djansezian/Getty Images)

Jwoww and Snooki

(Photo by Jason Merritt/Getty Images)

Victoria Beckham and Eva Longoria

(Photo by John Shearer/Getty Images for InStyle)