This is the third time we've spotted Biebs almost giving a little too much exposure!Justin Bieber performed to the frenzied crowds of Liverpool on March 11, and while the choreography was well-planned, his outfit wasn’t!Biebs, 17, came onstage with his fly wide open! Apparently realizing his mistake, he performed much of the show with his hand strategically over his crotch so he wouldn’t end up