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!
Sammi Giancola and Angelina Pivarnick
When Giancola felt her Jersey Shore castmates betrayed her by keeping Ronnie Ortiz-Magro's infidelities a secret, she latched onto Pivarnick. "I have been more than a friend to you," Giancola said when Pivarnick left mid-season. "I gave you enough respect to be cool with me, and you blew it."