Celebrity Best Friend Breakups

There are so many celebrity friendships to adore, from Drew Barrymore and Cameron Diaz's longtime BFF love to Jennifer Lawrence's fun-loving circle of friends, but even high-profile pals can suffer a breakup. Over the years, Paris Hilton has fallen out with both Kim Kardashian and her Simple Life costar Nicole Richie, and who can forget the epic Spencer Pratt-related arguments between Lauren Conrad and Heidi Montag on The Hills? Katy Perry and Rihanna's rift was allegedly over Chris Brown, and Gwyneth Paltrow and Winona Ryder reportedly parted ways over a movie script. Keep reading to see 10 celebrity friends that have had beef.