Justin Bieber Treats Fans to Boyfriend Sing-Along

Justin Bieber treated fans to a sing-along of his latest single 'Boyfriend' with an impromptu performance of the hit track outside the 'Tonight Show With Jay Leno' studio in California.

Source: http://www.femalefirst.co.uk/celebrity/Justin+Bieber-245069.html

Emma Stone Emma Watson Emmanuelle Chriqui Emmanuelle Vaugier Emmy Rossum Erica Leerhsen Erika Christensen Estella Warren