Alicia Keys, Kendrick Lamar Perform On Stage in LA: 'Set the World on Fire' Tour Features Surprise Appearance From 'Poetic Justice' Rapper [VIDEO]

On Alicia Keys' March 12 stop on her "Set the World on Fire" tour in Los Angeles, she gave fans a big surprise by bringing rapper Kendrick Lamar to the stage. A fan recorded a YouTube video (below) at the concert Tuesday night showing the Compton rapper joining Keys on stage. Lamar aka "K-Dot" was just recently voted "Hottest MC" by MTV and he is set to go on his own tour this summer with his Black Hippy crew. Read More »