Sean Parker, 32, helped raise Facebook, invested in Spotify via Founders Fund and midwifed the partnership between the two companies. In September, Spotify became Facebook's most prominent partner in Open Graph, the technological gateway for other companies to tap into the fiber of Facebook's vast social network.
At the f8 conference, Spotify CEO Daniel Ek even shared the stage with Facebook CEO Mark Zuckerberg. Parker nearly outdid them by hosting performances by the Killers, Snoop Dogg and Jane's Addiction at his post-f8 party.
Hobnobbing with A-list musicians didn't get Parker on this list, however. A co-founder of the original Napster, Parker has been integral to how people now consume music legally and has turned into one of the record industry's biggest cheerleaders. He may have started out in illegal downloading, but he's helping guide the marketplace to a future where streaming and social create better listening.