Show Crashers: When Music Stars Make Uninvited Appearances
Papoose Rocks Kendrick Lamar Set
Hip hop fans were a bit bewildered at Hot 97's 20th annual Summer Jam when Kendrick Lamar, immediately following his set, turned the stage over to self-proclaimed King of New York, Papoose. Even though the unannounced performance was planned, it still looked like Pap was pulling off yet another univited stage moment by a rapper. Here's a look at other moments of unexpected appearances.