Diddy punched Drake over a song, not girlfriend Cassie

There were reports yesterday that Diddy punched Drake at a night club after he disrespected Cassie. Well, Diddy did put his hands on Drake, but it wasn't over Cassie or any other woman. According to TMZ, it was over a song, "0 to 100/ The Catch Up" which was just nominated for two Grammys - Best Rap Performance and Best Rap Song.
From TMZ

Our sources say, producer Boi-1da had given both Diddy and Drake a song to record more than 8 months ago. We're told Diddy sat on the song, which frustrated Drake because he wanted to record it. So recently Drake recorded the song on his own and it did well, which pissed Diddy off.

Diddy saw Drake at LIV Monday for the first time since the song was released. Sources close to Diddy say he confronted Drake, who just blew him off, and that's when Diddy said, "You'll never disrespect me again," and then punched him.

We're told Drake ended up at an ER because in the ruckus he hit his shoulder and exacerbated an old injury.