Celebrity Feuds: The Biggest Ever!
Selena Gomez vs. Kendall and Kylie Jenner
Though they have since ended their feud, young Hollywood's hottest were at odds in spring 2014, with Gomez unfollowing the Keeping Up With the Kardashians stars via Instagram when she thought Kylie got a bit too close to her on-again, off-again boyfriend Justin Bieber at the Coachella Music and Arts Festival. "Selena felt Kylie was flirting with Justin," a Bieber insider told Us at the time. "It got messy."