elvis. the 28-year-old was billboard's artist of the year last year. >> expect to have some fun with us. >> he has 14 past grammy nominations but only one trophy so far. he could soon add to his collection with four more nominations this year. outside the studio, he has invested in chromatic, a start up for digital sheet music and njoy he uses to kick the habit. mars will play the super bowl halftime show for 100 million viewers. he joins legendary peers, the first artist under 30 to headline in a decade. the business for bruno mars is far from over. >> i feel i haven't started yet. >> carol to give you a sense of popularity, sales numbers for the u.s., unbelievable. two albums so far. 2.1 million sold for unorthodox