Nas & Lauryn Hill, after Nicki Minaj bailed.
Rick Ross, Wale, DJ Khaled, Slaughterhouse, Young Jeezy, Mavado, 2 Chainz, Big Sean, Waka Flaka, French Montana, Maino, Tyga, Trey Songz, and many more will take the stage at the 2012 Hot 97 Summer Jam with surprise guests also hitting the stage. UPDATE: Live stream is over. Miss Info has a great break down of what happened. And I've updated the post with performance clips.
Rick Ross & MMG