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!
Ken Paves and Jessica Simpson
What caused the former BFFs to split? "Ken is sick of her cycle of dumping friends when she's with a guy," a source tells Us of Simpson, who married ex-NFL star Eric Johnson in July 2014. "She doesn't care about the world, only herself. All she talks about is men, love, and sex."