This year marks Dianna's first time on the Pop 100! The Glee star shed her good-girl image earlier this year when she and her costars Lea Michele and Cory Monteith caused a bit of a controversy with a sexy GQ spread in October. In season two, the Glee cast performed some of their most ambitious episodes to date, including their Lady Gaga spectacular, and Dianna also starred in I Am Number Four with her former real-life flame, Alex Pettyfer. There was buzz that the pair was engaged around the movie's February release, but they split soon after. She moved on from the relationship by focusing on time with her girlfriends, chopped off her long locks at the end of Glee's season, and is currently on a nationwide tour with her costars.