These stars used to be close friends. Now they are very bitter enemies.
Kim Kardashian and Paris Hilton
Kim Kardashian actually served as Paris Hilton’s personal assistant. Then, she stole that whole sex tape idea from her boss and the rest of large-breasted history.
Demi Lovato and Miley Cyrus
“People change.” That’s what Demi Lovato said of Miley Cyrus when asked why they are no longer friends in 2014.
Ken Paves and Jessica Simpson
Ken Paves remains a haistylist to the stars. One of those stars simply is no longer Jessica Simpson.
Bethenny Frankel and Jill Zarin
Once Bethenny Frankel made it big as a businesswoman, Jill Zarin felt her former Bravo castmate forgot where she came from and turned her back on old friends.
Brody Jenner and Spencer Pratt
Remember Brody Jenner on The Hills? Barely? That’s because former close friend Spencer Pratt got him kicked off the series.
Madonna and Gwyneth Paltrow
Madonna and Gwyneth Paltrow haven’t spoken since 2010. It’s unclear why, but an insider tells Us Weekly that Paltrow can be “jealous and competitive.”
Nicole Richie and Lindsay Lohan
Nicole Richie and Lindsay Lohan used to frequent many parties together. But the former has settled in to a routine as a mother and the latter has… well… not.
Sammi Giancola and Angelina Pivarnick
Angelina Pivarnick left Jersey Shore in the middle of a season, but not before Sammi went off on her for keeping her boyfriend’s cheating a secret.
Heidi Montag and Lauren Conrad
Two more former cast members on The Hills who saw their friendship fizzle. Montag supposedly spread rumors of an LC sex tape.
Tori Spelling and Tiffani Thiessen
These ex-Beverly Hills 90210 co-stars are no longer friends. But Spelling could say that about many of her past colleagues. “All my cast members hate me,” she once told Ryan Seacrest.
Rihanna and Katy Perry

Katy Perry reportedly had enough of Rihanna getting back together so many times with Chris Brown. We feel the same way.