"unorthodox jukebox." outside the studio, invested in chromatic, making digital sheet music and njoy, he uses to kick the habit. up next, mars will play the halftime super bowl and joins legendary pierce, first under 30 to headline in a decade. the business of being bruno mars isn't even over. >> i feel like i haven't even started yet. >> reporter: he sold millions of albums thanks in start to strategic business plans. not a bad start. fredricka? okay. so if you do watch the super bowl this weekend, you're going to want to keep an yeah on one of the running backs for the seattle seahawks. he is unlike any of his teammates and making history in the game tomorrow. before it even starts. here's dr. sanjay gupta.