Some stars cannot be best friends forever. Find out why these former celebrity BFFs are no longer pals, including Kim Kardashian and Paris Hilton's disintegration of friendship due to jealousy issues, Jill Zarin and Bethenny Frankel's nasty falling out on reality TV, and more!
Bethenny Frankel and Jill Zarin
Zarin felt ignored after Frankel's business ventures took off — and subsquently stole the show on The Real Housewives of New York City. "If she's saying that I told her she needs to get a hobby, then that's accurate," Frankel told Us. "I don't regret anything I've said."