Usher challenges 'Voice' rival Adam Levine to box, but not Bieber

Usher is ready to go toe-to-toe boxing with Voice coach Adam Levine.
The R&B star might have bested Levine on TV already, winning the reality voice competition as a judge.
But he took it a step further during a Paste BN interview for Hands of Stone at Wild Card Boxing club. Usher laid out a new boxing challenge to Levine.
"I beat him already," Usher taunted. "In the boxing ring, maybe we could arrange that."
"I'd take you," Usher said looking at Levine dead-on through the camera. "Come on man."
"I told Adam, anytime you want to dance with me, let's do it."
Usher worked himself into true boxing shape to play Sugar Ray Leonard alongside Robert De Niro and Edgar Ramirez in Hands of Stone (opening Friday). He even showed off some of the moves. Impressive.
But mentor Usher said he wouldn't take on Justin Bieber.
"That would be like me beating my son up. Who walks out? Obviously I do. But I wouldn't challenge my son," Usher said.
However, if he had to choose in a seven round fight?
"I'd give him seven," Usher said of the troublesome Biebs. "I'd make sure he (lasts the rounds), so that he learns a lesson."
And against his onscreen rival Edgar Ramirez (who plays Roberto Duran): "I'd get him in two rounds."
Usher did say he would lose one challenge. To the real Sugar Ray Leonard. "I think I'd last .08 seconds," he said.