Justin Bieber posed alongside his mentor/friend, Usher, for the cover of the May issue of Billboard magazine.

The young superstar dished on what he has learned from Usher and on pushing himself and taking risks. And Usher dished on Justin's mad MC skills.

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Here's what they had to say:

Justin on Pushing Himself: "I don't want to lose my young fans, but I also want to mature and develop. I always keep one foot out of my comfort zone, trying new things and experimenting -- if you don't, people will get bored. Seeing the smiles on people's faces and how I affect them when I perform makes me want to give them the absolute best experience they can possibly get."

Justin on Usher: "What's great is that in Usher, I have a mentor that's been doing it so long and has been successful in everything that he's done. He's made some mistakes, too, but he's learned from them, so he can tell me what to do and what not to do."

Usher on Justin's MC Skills: "He's always been a dope MC. C'mon. Easy. 'Boyfriend' was really the defining moment; it became No. 1 everywhere, which is what dreams are made of. Both of us are being modest about what our journeys have been in terms of songwriting: Justin really has participated in every writing session -- that's amazing. It's easy to just dial something in, but you make the music authentic, people feel connected to you as an artist from the beginning."

JB does have made MC skills... Right?

Photo courtesy of Billboard