13. Sinead O'Connor vs. Miley Cyrus
Yes, Sinead O'Connor is still around. And her feud with Miley Cyrus actually ignited some interesting points about mental health.
14. David Letterman vs. Bristol Palin
David Letter had a lot of fun at Bristol Palin's expense when the teenager was pregnant. Some thought he crossed a line.
15. Khloe Kardashian vs. Joan Rivers
So much for Khloe's appearance on E!'s Fashion Police. The reality star snubbed the talk show host after Rivers mocked Kim Kardashian Superstar.
16. Naya Rivera vs. Lea Michele
Glee stars Naya Rivera and Lea Michele are reportedly beefing.
17. Mike Epps vs. Kevin Hart
On a radio show, Mike Epps referred to Kevin Hart as "overrated." Hart then told Epps to kill himself.
18. T.I. vs. Azalea Banks
T.I. is furious with Azalea Banks, who recently took shots at his wife Tiny ... he also recently fought Floyd Mayweather over Tiny.
Wait! There's more Celebrity Feuds We Never Saw Coming! Just click "Next" below: