Bridget Marquardt gained notoriety after getting naked for Playboy magazine and hooking up with Hugh Hefner. Then E! came knocking on Hef's door and wanted to make a reality show about him and his three girlfriends, hence the show The Girls Next Door was born. After just three seasons though, the girls grew into women and began to fly the coop, leaving Hef alone and moving on in their own lives. Bridget did get noticed enough so that the Travel Channel is giving her a show, "Bridget's Sexiest Beaches." Kristen Bell first got our attention by playing the title role in Veronica Mars; and since then she's had a recurring role on Heroes. She recently starred in the hilarious Forgetting Sarah Marshall and as a Star Wars geek in Fanboys.

Who's it gonna be? Bridget or Kristen? Vote!

The schedule:
First Round Voting: March 19-22
Second Round Voting: March 23-25
Sweet 16 Voting: March 26-28
Elite Eight Voting: March 29-31
Final Four Voting: April 1-3
Championship Voting: April 4-6
The champion will be announced on April 7th!

Check out the full bracket of all 64 Female Celebs here, you can even print it out and keep track of winners & losers!

-Men's bracket