Age: 32
Occupation: Singer-songwriter
You've probably heard (and liked) indie singer-songwriter Michaelson without even knowing it. From Old Navy ads to Google Chrome spots, she has been a one-woman sound-track machine, with dozens of her songs featured in advertisements, TV shows and movies. At a time when commercial success in the music industry is increasingly hard to come by, Michaelson has done better than any other major artist at straddling the blurry line between advertising and pop music — and by that measure, she's a superstar.