Credit: Dimitrios Kambouris/; Kevork Djansezian/Getty; Jeff Kravitz/FilmMagic

Once the perfect gown is chosen, the stars and their glam squads start dreaming up hair and makeup looks to match.

Glee star Dianna Agron, 25,  played it safe with her pink Caroline Herrera gown, but took a beauty risk with her fishtail braid updo.

Lea Michele, 25, went with the opposite approach, showing off serious leg in a super-sexy Versace dress, which she paired with a simple blowout.

In keeping with her glamorous tea-length Alexander McQueen design, Emma Stone, 23, wore her hair in an elegant undo and pretty makeup.