7 Crazy Celebrity Feuds You'd Have to Read about to Believe ...

1. Christina Aguilera V. Kelly Osbourne

Celebrity feuds are often sparked by one comment - according to Kelly, Christina provoked her by calling her fat a few years ago in an interview. Kelly then retaliated by saying, “Maybe she’s just becoming the fat b***h she was always born to be” on-air in 2011. Christina didn’t respond to that comment, while Kelly has continued to make snide remarks about Christina’s weight.

2. Nicki Minaj V. Mariah Carey

It all started on American Idol, when these two superstars continuously tried to out-diva each other. Apparently tensions flared even before the show went to air, and a video was leaked of Nicki storming off set, shouting that she wasn’t going to put up with “her f***ing highness over there.” Mariah stated in an interview that she had hired extra security because she didn’t feel safe around Nicki. Oh dear!

3. Dave Grohl V. Courtney Love

Both connected by their love for the late rocker Kurt Cobain, Courtney Love and Dave Grohl just can’t extend that love to each other. Courtney, Kurt’s former wife, recently called Dave’s band (The Foo Fighters) “gay,” and accused him of flirting with her daughter, Frances. Dave, a former Nirvana member, retorted, calling Courtney out on her substance abuse.

4. Miley Cyrus V. Sinead O’Conner

The public letter that started this all is known to many people. In the open letter that Sinead O’Conner wrote to Miley, she offered her a string of advice, some of which implored Miley not to “prostitute” herself to the music industry. Distastefully, Miley swung back by posting screenshots of Tweets that Sinead had made while she was experiencing a mental breakdown, comparing her to Amanda Bynes. Sinead replied, telling Miley that it’s “stupid and dangerous” to make fun of people with mental illnesses.

5. Kings of Leon V. Ryan Murphy

When Kings of Leon refused to let Ryan Murphy re-make one of their songs on his hit TV show Glee, Ryan got revenge by calling the group a bunch of “self-centred a**holes.” The drummer of Kings of Leon, Nathan Followill, told Ryan to “see a therapist, get a manicure and buy a new bra,” to which Ryan responded, calling him homophobic. Yikes!

6. Lady Gaga V. Perez Hilton

This feud is pretty sad, as these two eccentric Hollywood personalities used to be the best of friends. Apparently Perez got onto Lady Gaga’s bad side by asking very personal questions and being very scathing of “Born This Way,” calling it a failure. Gaga then shot back via Twitter, calling Perez a stalker after he was apparently hanging around outside her apartment. This is one feud that was played out very publicly, through the use of social media.

7. Seth Rogen V. Justin Bieber

There is absolutely no secret about the fact that these two hate each other. Seth Rogen has posted a string of offensive comments to Justin Bieber, calling him a “bit of a d**k,” amongst many others. Justin has recently responded with a sarcastic remark about not bowing down to Seth the last time the two met.

These celebrity feuds just go to show that sometimes people that are connected by something, in this case fame, don’t always necessarily get along! What do you think of these feuds? Rightly deserved or a bit too childish? Let me know in the comments!