Look at the picture he just uploaded to Twitter...

Apparently he got hit with a bottle at a party in NY. There are speculations that it has something to do with Rihana as theywere both hanging out at Jay z's club 40/40.
SOURCE:
thatgrapejuice.net
Reports are coming in from various sources that it was actually DRAKE who fucked Chris Brown up! This video is being put out by a Hip-Hop vlogger who was actually there at the party. At the end, you can see Drake, Chris Brown and their entourage spilling out onto the streets outside the club:
Chris Brown's Tweets when he tweeted the photo: