Chris Brown, Drake in Bar Brawl Over Rihanna

Chris Brown and Drake reportedly started fighting over Rihanna last night, and it ended up with their respective entourages in a nightclub brawl. Five people were injured in the New York City fight, TMZ reports. Brown tweeted a picture of his chin—apparently slashed after someone threw a bottle at him—along with the message, "How u party wit rich n**** that hate? Lol... Throwing bottles like girls? #shameonya!." Both have since been removed, but TMZ has the photo, and the Huffington Post has more charming tweets from Brown including, "N*ggas throwing bottles! Y'all n*ggaz weak!"

In related news, Brown and Rihanna continued their practice of showing up at the same places Monday night, when both were at another New York City club. Rihanna had another guy with her, but Brown "looked over at her from his table across the way," a source tells People. The New York Post goes further, claiming Rihanna basically followed Brown around the city and adding that the two appeared to be texting each other at the club. The Daily News adds that Rihanna is "pissed" Brown insists on continuing to date Karrueche Tran, according to sources. And in yet another sign that Rihanna is falling apart, Perez Hilton reports that her friends—including Jay-Z—are encouraging her to go to rehab after "out of control" partying. (More Chris Brown stories.)