Justin Bieber Brings “Boyfriend” to " The Voice"

　　Justin Bieber’s a man of his word, and Justin Bieber showed up at “The Voice” last night to perform “Boyfriend” just like he promised.

　　The “One Less Lonely Girl” hitmaker was in fine form as he took the stage with an army of backup dancers and plenty of fake smoke to sing his new single.

　　Justin definitely upped the ante this time around, adding in some pelvic thrusts and other more "mature" touches.

　　And not only did the crowd love it, but celebrity coaches Christina Aguilera and Adam Levine could be seen getting into the groove.