Big Sean Lashes Out At Justin Bieber For Touching Ariana Grande

Justin Bieber really wanted to touch Ariana Grande during a performance last night, but neither she nor Big Sean was having it. It's never cool to make unwanted contact with anyone, especially another dude's girlfriend — especially when you've got the Bieb's track record. The whole scene had Sean ready to rumble, and he took to Twitter to fire a warning shot.

TMZ caught the scene on video. Bieber was a surprise guest at Grande's L.A. Forum gig last night, and teamed up with Ari for "As Long As You Love Me." The Biebs beckoned her over at the end of the song and proceeded to put his arms around her. Ariana disengaged with lightening speed, making her displeasure pretty obvious.

Big Sean's displeasure was also pretty obvious. "This kid is about to learn not to touch my girl like that. Beliebe that," he wrote on Twitter. He deleted it, presumably because the element of surprise is crucial when you're plotting revenge.