'I'm the Conor McGregor of entertainment': Justin Bieber doubles down on Octagon challenge to Tom Cruise

A potential battle between A-listers Justin Bieber and Tom Cruise has once again reared its head after the pop star repeated his challenge to the Hollywood star to face him inside the UFC's octagon. Bieber, 25, made the initial challenge to Cruise on social media in the summer of last year in a move...