Viva Las Vegas! Kendrick Lamar, Ashanti and Trey Songz kicked off their Labor Day Weekend Festivities performing to packed Vegas crowds along the strip. Ashanti performed at Moon Night CLub in the Palms, Kendrick performed to a turnt up poolside audience at Ditch Fridays at the Palm Casino and last but not least Trey Songz lit up TAO nightclub at the Venetian, Hit the jump for videos of the performances!