Kristen Bell -- who celebrates her 31st birthday today -- has been one to watch on the red carpet. The blonde babe, who has made us laugh in such films as "Forgetting Sarah Marshall", "Couples Retreat" and "When in Rome" has a flirty sense of style -- which makes sense, considering she's one of our favorite Rom Com stars.

Never one to blend in, the new face of the Neutrogena Naturals line has tried evening from sequins to florals and even a hard-to-pull-off jumpsuit. To celebrate the leading lady's birthday, we compiled her top 12 red carpet looks -- let us know in the comments section below which ensemble you think takes the cake. For feminine yet risk-taking looks similar to Bell's, check out this stylish blogger's picks!

Plus, you'll never guess who Bell was caught kissing at a premiere!