Thin straps that sit wide on the collarbones create the illusion of a long, swanlike neck—even if you're not Keira Knightley. Plus, that color: it's major. No wonder everyone's still obsessed with this dress.
That jewel-tone's gorgeous, and those tiers will sway ever so slightly when you dance. (You might not want to wear it with Converse like Kristen Stewart does in the film, but you know, to each her own.)
Black and gold embroidery feels so regal—perfect for Queen B, or anyone else who wants a luxe, sorta powerful-looking prom dress.
"caryn" bustier dress, $279.20, alice + olivia, saks.com
Some Like It Hot
That silhouette's a popular choice for a reason: it's so, so flattering. Use it's wrappy Grecian goddess-ness to give you Marilyn curves instantly (or at least the illusion of them).
"anitra" halter gown, $468, bcbg max azria ,zappos.com
She's All That
'90s minimalism at its best. (Of course, if you buy a dress like this, you have to wear your hair up and walk down the stairs of your house excruciatingly slowly, like Rachel Leigh Cook does in the movie.)