Birdman Gets Denied Entry At Nicki Minaj Pre-Grammy Party!

Now that I think about it Birdman has been causing some problems with a lot of the artist under the roster of the YMCMB imprint. It also seem like Birdman his more worried about his latest imprint to the YMCMB empire Rich Gang in which Nicki Minaj, Lil Wayne, Drake, and Tyga are all not signed to. Here TMZ catches Birdman attempting to enter Nicki Minaj's Pre-Grammy party, where he is not allowed access. I Wonder Why?