You Asked, We Found

We did the hard part (tracking down Jenna Dewan-Tatum's dress, Cara Delevingne's suit and Amal Alamuddin's shades). Now you have the easy job (whipping out your credit card)

CHLOË GRACE MORETZ'S MINI

"I'm guessing this dress is custom and that it's way out of my price range, but on the off-chance it's not ..." – Mari
You're wrong that it's custom, but you're very, very right about the price. The Valentino floral design rings up at $6,690 (but import tax is included in that, so, you know, totally justifiable).