Earlier this week Bieber challenged Tom Cruise to a "fight in the octagon".

Conor McGregor was quick to get involved, and offered to host the fight, and also challenged Mark Wahlberg for a fight on the same bill.

Bieber has since backtracked on his initial challenge, revealing to TMZ that he was just joking, "It was just a random tweet, I do that stuff sometimes."

Putting the fight into perspective, Bieber revealed, "he'd whoop my ass", before adding, "I’d need to get in better shape. He’s got that Dad strength."

Bieber recently featured on Ed Sheeran's "I Don't Care". He also teased last weekend that there's "more music coming".