"I don't know them." Lol @justinbieber @yael @jlo #vegas

A video posted by Scooter Braun (@scooterbraun) on

Justin Bieber sang at the opening night of Jennifer Lopez’s “All I Have” show at Planet Hollywood in Las Vegas on Wednesday, although not on the stage. Bieber humorously belted out her song “Waiting For Tonight” with his manager Scooter Braun while sitting in the audience. 

In a video posted by Braun on Instagram, the two sang an off-key version of the chorus to “Waiting For Tonight.” The video then pans to Braun’s wife, Yael, who laughs as she says, “I don’t know them.” But that’s not the only somewhat embarrassing video of Bieber at Lopez’s show. While making his way out of concert afterwards, Bieber tripped and nearly fell to the ground.

Bieber also posed for photos with Rebel Wilson and Kelly Osbourne, who were at Lopez’s opening night as well. Wilson captioned one of the pictures on Instagram, “Successful mission #HowToBeSingle.” In another image, Wilson displayed a hand-written note she and Osbourne composed to Bieber that read, “We think you should take our sexy hot asses out after the show (nothing weird).” She added, “This is HOW to pick up Bieber at the J Lo concert with @kellyosbourne X.”


A photo posted by Rebel Wilson (@rebelwilson) on

Photo: Getty Images