First it was Rhianna, then Drake. Now Chris Brown is beefing with R&B critics' darling Frank Ocean. According to TMZ, the two

mixed it up Sunday night in the parking lot of Westlake Studio in Los Angeles. Chris was there to listen to one of the artists he reps and was about to leave when he ran into Frank Ocean and his posse in the parking lot. They blocked his exit with Frank reportedly taunting Chris by saying, "This is my studio, this is my parking spot."

Chris apparently tried to make peace by shaking Frank's hand, but then one member of Frank's crew jumped on him. Members of each of the stars' crews went at each other and then Frank went after Chris and the two fought. It was serious enough that police had to be called.