No, no, no...Biebs isn't thinking about throwing his 75-pound frame (give or take) into the  Octagon anytime soon. But, as we've pointed out in the past, he is a huge UFC fan. So during a recent show in Rio de Janeiro, JB brought UFC Middleweight Champion and Brazil native Anderson Silva out on stage and challenged him...to a dance-off.  Sigh.

Hey, Anderson: Hope you're ready for all the 14-year-old Twitter followers coming your way! [via The Big Lead]