Which A-lister had the biggest red carpet transformation of 2010? Vote now!

2010 was a year of some very pretty red carpet moments, but some people had bigger moments than others. Which gorgeous red carpet star showed the biggest improvement from 2009 to now? Let’s look at year that was 2010, then vote for YOUR favorite Best Red Carpet Beauty Transformation of 2010:

Ashlee Simpson goes from dark and goth-y to an impossibly chic pixie cut.  Seemingly channeling legendary style muse Edie Sedgwick. Style watchers everywhere applaud.

Lea Michele becomes acquainted with her glam squad, channels old school Hollywood glamour with amped-up hair and sultry makeup. Sexy magazine spreads follow and our Glee girl officially turns up the heat.

Kelly Osbourne drops weight, grows out her hair and goes from punk princess to red carpet glamour gal almost overnight. Winds up on the cover of Shape magazine and develops a whole new career as a style icon.

Dianna Agron goes from fresh-faced ingenue to red carpet worthy star. Channels Grace Kelly at the Emmys with a gorgeous textured updo and alluring makeup. Beauty editors everywhere fall in love.

Emma Watson leaves Hermione Granger on the salon floor with a chic pixie cut that sends a million women into salon chairs everywhere. Adds lovely lashes and a pretty pink lip. College men everywhere consider transferring to Brown University.

Jennifer Hudson loses a whole lot of  weight, adds long hair and flawless, red carpet-worthy makeup. Her inner sex kitten inspires women to get extensions and join Jenny Craig en masse.

All of these were pretty significant red carpet transformations, but only one can win the award for the biggest transformation this year. Who do YOU think deserves the award for Best Red Carpet Beauty Transformation of 2010? Vote now!