Classical crossover star Josh Groban can do just about anything—from selling over 25 million albums worldwide to poking fun of himself on shows like Jimmy Kimmel Live. Blending the virtuosity of an opera singer with the flair of a rock star, Groban's 2001 self-titled debut album was an immediate smash and by the end of the decade he was a household name. A superb vocalist, he can sing both tenor and baritone parts and has recorded covers of songs from just about every genre. He's also appeared in numerous sitcoms and films. The guy is a true 21st Century showman.