Justin Bieber trended online earlier this week after he hopped on Twitter and challenged 'Mission Impossible' actor Tom Cruise to a fight.

“I wanna challenge Tom Cruise to a fight in the octagon,” Bieber tweeted. “Tom if you don’t take this fight your [sic] scared and you will never live it down.”

But now the pop singer is backtracking:

“It was just a random tweet. I do that stuff sometimes,” Bieber said in a video to TMZ.

“I think he would probably whoop my ass in a fight,” he added. “He’s got that dad strength.”

Bieber's tweet went viral and UFC fighter Conor McGregor tried to get in on the action by offering to host the fight if Cruise accepted the challenge. Cruise did not publicly address the challenge, but social media has determined that he would most likely win the match if it ever did go down.

Maybe Bieber got scared.