Jessica Alba

Beginning her career as a wholesome teen star, Jessica Alba probably would have stayed on that safe, shrink-wrapped career path if Robert Rodriguez hadn't gotten a hold of her. The two first teamed up for Sin City -- in which Alba does the sexiest stripper dance without nudity ever filmed -- and then again for 2010's Machete. The gritty grindhouse movie gave her a dangerously sexy edge. Now we'll watch anything that she's in, even if it's Spy Kids 4. Unfortunately, there was no Aromascope for Alba's hair.

 

  Olivia Wilde

How hot is Olivia Wilde? The former House star is so attractive that men want her, and women, well, want her, too. The brunette bombshell has made out with more actresses than we can count, and Megan Fox once openly campaigned to be next on that list. Wilde made $200-million worth of CGI eye candy pale in comparison to her skintight suit in Tron: Legacy, and the only thing we cared about in Cowboys & Aliens was whether she'd get more screen time. Now that's hot.