Vogue 8413, which was also used as the starting point for the Frank Party dress.
I won't lie, this is a fun dress to wear because it obviously sticks out in a crowd. Brightly colored fabric in an eye-catching, large scale, "how did you match those seams" print? Check. Satiny, swoopy peachy collar? Check. Semi-twirly skirt? Check. Let's not kid ourselves, it shouts at you. But I suspect Matt likes it because it keeps the "where's Waldo"-ish moments to a minimum.
The details: fabric was some leftover home dec stuff at Hancock's Fabrics last season. It's a cotton that has about the same weight as a drapery fabric. The pattern doesn't call for lining but I do so it's got a basic polyester china silk on the inside.
Since there's not much else to discuss on this item we'll end with a toast to a good party with great friends.