Justin Bieber is taking over Radio Disney!The 16-year-old musician chatted with host Ernie D about his new tune, “Pray,” which he will also be performing at the 2010 American Music Awards next week.Justin shared, “‘Pray’ is one of my favorite songs I’ve ever recorded. It’s very motivational and really inspiring. It definitely is able to touch people…There’s so many songs about love, and it’s just