The Canadian teen pop star and the '90s R&B act performed together as part of Bieber's "My World" tour on Tuesday night in New York City.
Justin Bieber & Boyz II Men Join Forces On Stage at Madison Square Garden
NEW YORK - AUGUST 31: Justin Bieber and Boyz II Men perform at Madison Square Garden on August 31, 2010 in New York City. (Photo by Kevin Mazur/WireImage)
Wednesday, Sep 1, 2010 Updated at 6:39 AM EDT