Startup(s): Stipple, Miso Media, Myspace

When not reading scripts, bum-rushing the SNL stage, or chilling with Jessica Biel, Justin Timberlake lends his celebrity (and money) to startups focused on the arts. He's invested in Stipple, a site that allows photographers to sell their images, and Miso Media, a website devoted to revolutionizing music education through technology like apps and interactive programs.

Most recently, he's been apart of the rebirth of Myspace. After the ailing social network was purchased by Chris and Tim Vanderhook, Timberlake has invested his money, time, and image in helping the rechristened social site become a hopeful home to musicians.