1.Alec Baldwin vs. American Airlines (featuring Words With Friends)
Alec Baldwin was kicked off an American Airlines flight because he refused to stop playing Words With Friends.
American Airlines gave their side of the story, saying: "This passenger (Alec Baldwin) declined to turn off his cell phone when asked to do so at the appropriate time. The passenger ultimately stood up (with seat belt light still on for departure) and took his phone into the plane's lavatory. He slammed the lavatory door so hard, the cockpit crew heard it and became alarmed."
2.Avril Lavigne vs. Mark Zuckerberg
That really pissed Avril Lavigne off.
3.Lady Gaga vs. Perez Hilton
Long ago, Lady Gaga and Perez Hilton were good friends. In 2013, that was no longer the case. Perez played into the whole "Lady Gaga is copying Madonna" thing that was popular at the time, and he turned against her.
Lady Gaga's fans tweeted that Perez was at Gaga's apartment and she flipped.
Then Gaga tweeted the iconic "STAY AWAY FROM ME + MY FAMILY" tweet and the rest is history.
4.Kim Kardashian West vs. Chloë Grace Moretz
Kim Kardashian West posted a mirror selfie, and for some reason, Chloë Grace Moretz came for her.
Kim came back with a pretty good response: "Let's all welcome Chloe to twitter since no one knows who she is."
And then Chloë tried to backtrack, saying she didn't slut-shame Kim when she...definitely did.
5.Jonah Hill vs. Don Lemon
Don Lemon got mad at Jonah Hill for not saying "hi" to him at the airport. Jonah Hill calls Don Lemon a 12-year-old girl, Don calls him rude, and Jonah says Don was stalking him.
6.Charlie Sheen vs. Rihanna
Charlie Sheen went on a really really long Twitter rant about how Rihanna wouldn't meet his fiancé when they were out to dinner.
Rihanna called him an "old queen" in diapers.
Charlie gave some stupid apology.
And Rihanna changed her Twitter header to a photoshopped picture of her signing an autograph for a fan with Charlie Sheen's face superimposed on it.
7.Drake Bell vs. Josh Peck
Drake didn't get invited to Josh's wedding and he took to Twitter to say their friendship is over.
The two ended their weird feud at the VMAs when they both posted the same hugging picture.
Then they made some fake YouTube video where they pretended to love each other.
8.Diplo vs. Lorde vs. Taylor Swift's butt
Diplo tweeted some dumb tweet about Taylor Swift not having a butt.
Someone started a Fundly for Taylor Swift's butt.
And then Lorde said Diplo had a tiny penis.
9.Adam Levine vs. Lady Gaga
Adam Levine subtweeted Lady Gaga with some stupid tweet about the originality of pop music and Lady Gaga subtweeted him back.
It was dumb.
Then Lady Gaga called the art police.
And Adam Levine said he was a musician, not an artist.
10.Lindsay Lohan vs. Goose62082
11.Zayn Malik of One Direction vs. Max George of the Wanted
In 2012 there were a bunch of One Direction and Wanted Twitter feuds, but this exchange is the best one. Max tells Zayn to stop smoking weed and Zayn calls him "chlamydia boy".
12.Donald Trump vs. Cher
13.Aimee Mann vs. Ice T
Aimee Mann tweeted about not wanting to see Ice T on TV.
Ice T responded by telling her to "eat a hot bowl of Dicks."
14.Farrah Abraham vs. the Kardashians
Farrah Abraham, from Teen Mom, called Kourtney Kardashian out for being pregnant again. Farrah said Kourtney should have learned her lesson from watching Teen Mom.
The thing is Kourtney was 32 then...so...
Eventually, the whole Kardashian clan chimed in.
15.Kendall Jenner vs. Frances Bean Cobain
Kendall Jenner randomly tweeted that she wished things in her life could be easier.
Then Frances Bean Cobain randomly REALLY came for her.
16.Jimmy Kimmel vs. Kanye West
Kanye West went on a very long, very caps lock Twitter rant after Jimmy Kimmel spoofed him on his show.
Eventually we got the iconic #NODISRESPECTTOBENAFFLECK hashtag.
17.Frankie Muniz vs. people trying to tell him he's bad at acting