Big Sean hit the stage at HAZE in Las Vegas late Thursday night, and performed a medley of his hit songs for the packed club crowd. Before that, he played the VIP area with his crew, sipping champagne and fist-pumping to PSY's "Gangnam Style." Players from the Los Angeles Lakers, including Metta World Peace, were in the building as well. Watch the video footage of Sean's performance above, which includes "Clique," "Mercy," and more. Oh God!