Easy DIY hairstyles are something of a holy grail, so when one of our favorite beauty sites, Into the Gloss, did a post on the tuck, we were all ears. This season's most iconic daytime 'do is simple: you leave your hair loose but don't pull it out of your top or coat, giving off an air of perfect, devil-may-care slouchy cool. Olivia Palermo, Victoria Beckham and Phoebe Philo are all advocates. And what could be a better match for this season's It sweater, the turtleneck?