America's Got Talent is welcoming classy jazz singer Michael Buble as a guest judge with some hysterical results.

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On Tuesday, Billboard released a sneak peek at Buble's appearance where he has a chat with a guy whose talent involves a free-standing ladder. The singer tells him that he expected himself to be part of a YouTube video called 'Poor Man Falls To His Death.'

This is when the contestant invites Buble on the stage to try out the ladder. He's pretty awkward about it, but the other judges and audience members cheer him on.

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Naturally, he gives in and walks up the stage to see what he can do with this ladder. When the music begins, he takes a step up, but then tries something else and seems to realize how hard it's going to be- so instead, he swings the ladder around and moves his hips on it as if he's giving this thing a lap dance.

The audience is laughing and applauding to Buble's racy performance as he makes it more sexy. Howard Stern, however, was not impressed since he hit the red X to show what he really thinks about it.

"Michael, that was about as bad as it gets," Stern said as the guest judge made his way back to his seat.

Buble admitted he thought he could do it. "I took the first step and thought, I'm just going to shake my a-- instead.'"

Check out the video below and watch America's Got Talent tonight, July 21 at 8 p.m. ET on NBC.