Singer Justin Bieber speaks on stage to introduce singer Carly Rae Jepsen (not pictured) at the 2012 Wango Tango concert at the Home Depot Center in Carson, California May 12, 2012.[Photo/Agencies]
Singer Justin Bieber gestures on stage after introducing singer Carly Rae Jepsen (not pictured) at the 2012 Wango Tango concert at the Home Depot Center in Carson, California May 12, 2012.[Photo/Agencies]