Can some tell him to get his hands off her? Justin Bieber can't keep his hands of Ariana Grande

Justin Bieber, 24, surprised Ariana Grande, 21, fans by hitting the stage for a sultry duet with his long time friend during her Miami tour. It looks like Justin Bieber can't get enought of the spotlight. as he joined the singer for another surprise appearance during her concert at The Forum in Inglewood, California. Ariana bought out her long-time friend for a rendition of her hit Love Me Harder, with Justin taking on the verses originally sung by The Weekend. More pics after the cut.