Big Sean Warns Justin Bieber no to Touch Ariana Grande

Big Sean has a warning for Justin Bieber. During Ariana Grande’s “Honeymoon Tour” at L.A.’s Forum last night, the pop diva brought out Bieber to duet on “Love Me Harder” and “As Long As You Love Me.” But the Biebs got a little too hands on with Ariana during the flirty performance, which did not sit well with her boyfriend Big Sean.

Sheeesh J Biebs, you better watch yourself, BIG SEAN ain't happy. 

UPDATE: False alarm. Big Sean’s rep tells TMZ that Sean’s threatening tweet is fake and he’s not upset at Bieber for getting flirty with his girlfriend. The two remain good friends.