Age: 34
Occupation: Actor, Twitter personality
Kutcher has had a roller-coaster year, from his replacement of Charlie Sheen as the lead on the CBS comedy Two and a Half Men to his high-profile split from Demi Moore after six years of marriage. Kutcher is often a newsmaker for more than his onscreen gigs, whether for his prolific tweeting, campaigning against human trafficking or soaring into space, which he is set to do as a passenger of Virgin Galactic's suborbital spaceflight.