If you have a white dress then you know the delicate balance of total excitement and total stress that comes with wearing it to a summer party. (While all eyes will be on you, your eyes will be on all the glasses of sangria.) Since I already have a white dress I’m set, but if I weren’t this one-shouldered banded number by Shoshanna - a little slinky, a lot sophisticated - would be the one for me. (Revolve; $320)