Leighton Meester showed off her dark hair color and bangs on the Boston set of I Hate You, Dad today. She's been rocking ombré locks and beachy waves in recent months, but changed things up for her latest role. Leighton and her Gossip Girl costars are currently on a break from shooting the series and are available to jump into new projects and romantic endeavors. Blake Lively struck up a romance with Leonardo DiCaprio during her travels through France, and just wrapped up her promotional duties for last weekend's box-office champ, Green Lantern. Penn Badgley just nabbed a role in Greetings From Tim Buckley as the legendary singer, a job that should allow him to show off his vocal skills. Leighton is a solid singer herself and even performed last week at the Troubadour in LA. Leighton teams up with another hot artist, Selena Gomez, in next month's tween caper Monte Carlo.