"I’ve always been a wallflower," writes Alexa Chung in the playful caption to her Instagram post, in which she's wearing a red party dress while perched on a piano preparing to sing karaoke. A new addition to the label's lineup, this ruffled one is made from lightweight taffeta and has flattering ruching through the strapless bodice. Run with the '80s vibe by wearing yours with a sweep of metallic eye shadow or draped blush.