The two pop stars teamed up onstage at Grande's concert in Inglewood, California on Wednesday night (08Apr15) to perform a pair of duets for the second time on the Problem hitmaker's ongoing The Honeymoon Tour, but Big Sean was allegedly unhappy with the performance, during which Bieber hugged the pop beauty from behind, and was said to have blogged about his anger on Twitter.com.

He reportedly wrote, "This kid is about to learn not to touch my girl like that. Beliebe (sic) that."

The news of his supposed Twitter threat went viral, but Big Sean's publicist has since told TMZ.com images of the alleged post are fake, because the hip-hop star never tweeted such a thing.

The rep insists Big Sean, who is currently on tour himself, is friends with Bieber and has no problem with the superstar singing with his girl.

Bieber previously joined Grande onstage at her show in Miami, Florida last month (Mar15).