Gone are the days when Kristen Stewart arrived on the red carpet in a Dunkin' Donuts tee and ill-fitting blue jeans.
Within three years' time, the Twilight actress — who turns 21 on Saturday — has ditched her grungy duds and transformed into a stylish, polished young star.
What's the reason behind Stewart's fashion transformation?
"She just let go more," a source tells UsMagazine.com of the actress, who now rocks sexy, girly designs by Emilio Pucci, Elie Saab and Versace. "She's having fun figuring out what looks good on her."
