I don't think I've ever seen Gwyneth Paltrow like this. She's basically sizzling on the red carpet in her white hot Pucci, and it's not a mystery why. The sexy lace-up details are a skin-revealing addition to an otherwise covered up floor-length dress. You don't want the sultry cutouts to be too overt, lest you should reveal a little too much, but lace-up detailing up the back or sides is just enough sexy. Next step: kill it with confidence.