When you combine the Internet with celebrities, you get a lot of strange feuds, especially from stars that are active on social media. The Internet gave birth to 2013's best celebrity catfights and HNGN has summed up the weirdest of them all.

7.  Kendall Jenner vs. Frances Bean Cobain

The Kardashian family member was having a bad day and tweeted, "Just wish things could be easier sometimes man." Cobain, 20, read the tweet and called Jenner, 17, a "f***ing idiot". The post incited a the following response from Jenner in a series of tweets where she basically asked Cobain, "who are you to judge me?" CLAWS OUT!

6. Frank Ocean vs. Chris Brown

The feud began with the two singers' crews dissing each other in a parking lot. Brown allegedly punched Ocean and a brawl ensued. However, no charges were ever filed. 

5. Amanda Bynes vs. Every "Ugly" Person On Twitter

Amanda Bynes called A LOT of people "ugly" before her parents and a court decided to step in on behalf of her well-being. Check out some of the tweets below, but he account has been deleted.

4. Joan Rivers vs. Jennifer Lawrence

Jennifer Lawrence thinks shows like "The Fashion Police" shouldn't exist, let alone be allowed to call someone "fat". Joan River's response: "[Lawrence] has been touched up more than a choir boy at the Vatican." Read more about this feud here.

3. Kanye West vs. Justin Timberlake

West made it clear he was not on his "suit and tie s***" during a concert around the time JT's single dropped. Timberlake's response came in the form of a lyric change during his SNL performance: "hit's so sick got rappers acting dramatic". Enough said.  Watch the disses in the videos below.

WARNING: Kanye's diss video contains explicit language.

2. Beyoncé vs. Rihanna

The amount of truth to this feud is up for speculation, but the two reportedly do not get along. The latest gossip blogs say Rihanna was pissed when Beyoncé dropped her surprise album the day the video for "Monster" was supposed to be released. To add fuel to the fire, Beyoncé allegedly did not extend an invite to Rihanna for her album release party, but did invite her ex Drake. SHADE! Read more about this feud here.

Warning: video contains profanity.

1. Miley Cyrus vs. Sinead O'Connor

It all began when the "Wrecking Ball" singer mentioned O'Connor was her inspiration for her short haircut. When O'Connor caught wind of Cyrus' comments, she felt the need to give her career advice in the form of an open letter. Long story short, O'Connor believes Cyrus is a puppet of the music industry and she is prostituting her body for her record label.

The 21-year-old responded by posting a photo on Twitter of O'Connor ripping up a photo of the Pope on SNL. Cyrus' tweets spawned four more open letters from O'Connor, and things only got weirder. (Read more here)