Usher and David Guetta Perform 'Without You' in Las Vegas

“I want my people in Ibiza, Europe to hear you scream!” exclaimed DJ David Guetta before bringing out Usher to perform “Without You” for the first time on Day 2 of the iHeartRadio Music Festival in Las Vegas. Smoke filled the stage as Ursh appeared in all blue with white sneakers, passionately belting out the dance track. The song, which is featured on Guetta’s new album Nothing But the Beat, is already No. 15 on the Billboard Hot 100.