How did Bruno Mars become Billboard's Artist of the Year? He grabbed hold of the album and single charts and never let go. Next uP: Super Bowl, Grammys and more of his Moonshine Jungle world tour.

Lady Gaga and Bruno Mars teamed up to offer an emotional tribute ... Jacob Collier, the Grammys' Surprise Album of the Year Nominee (Again), on Learning From Quincy Jones and Where He Landed ...