Ever have that nightmare in which you’re naked on stage being laughed at? Justin Bieber lived that very scenario on Tuesday night. The pop star participated in a very awkward sketch during the Fashion Rocks concert in New York City, when he stripped down to his underwear to showcase his Calvins (talk about product placement). But the crowd didn’t seem to enjoy the semi-nudity, booing him from the moment Bieber appeared onstage to when he began flexing in his undies.