Justin Bieber Flashing his Black Underwear

Earlier this week, we finally saw what Justin Bieber was hiding underneath his pants, and those were his boxer briefs. But days before we ever saw Bieber in his skivvies, he was photographed leaving his girlfriend Selena Gomez's concert. As Justin was running away from crazy fans, his pants seemed to be falling down  (as always), which revealed the 17-year-old singer's black underwear.

5 pictures inside