15. Taylor Swift
Occupation: Musician, actress
Biggest accomplishment this year: Scoring her first-ever No. 1 Billboard Hot 100 single with "We Are Never Ever Getting Back Together"
It would be a fun experiment for Taylor Swift to see if she could release a song that wouldn't go to No. 1. We're confident that there is absolutely nothing the 23-year-old couldn't turn into a hit, as she now has had an astounding 41 singles appear on the Billboard Hot 100 chart. She also recently appeared as a bitter ex on an episode of New Girl, a role that she seemed particularly well-suited for. Of course, we would be remiss if we didn't mention her extensive dating history, and after her most recent relationship (with One Direction's Harry Styles) fizzled, she's found herself single yet again. Several singles lamenting this fact will inevitably follow.