How is this for some random news.....Justin Bieber tweeted a strange challenge to Tom Cruise. Singer Justin Bieber challenged Tom Cruise to a fight in 'the octagon.' Fans think Tom would totally win. He does all of his own stunts and has flown on the outside of an airplane, Justin has only dodged teenage girls for most of his life. Tom Cruise stands at 5' 7 and weighs 170 pounds. Bieber is 5'9" and weighs 145 pounds. Conor McGregor said his company would gladly host the fight.