Usher is realizing there are limits to his influence, especially when it comes to Bieber's current behavior. "Our relationship is more man-to-man now," he says. "He's making his own decisions and it's important to show support. I can say I'm not happy with all the choices my friend has made, but I'm supportive of him. I try my hardest to give as much positive reinforcement as I can. I'll punch him in the f---ing chest when I need to, and give him a hug and kiss when I need to. It's more than just mentoring. I love the kid."