Sienna Miller slipped into next to nothing and hit the beach in Barbados today. Her bikini body isn't too rare a sight from the vacation-loving celebrity, but this scene looks like a particularly delightful getaway. At the end of last week Sienna was still in NYC sneaking in a romantic carriage ride with Jude Law, but he was nowhere in sight as she took a stroll with a companion. Sienna allegedly did ask Jude to join her for a tropical Christmas, which would only be the latest evidence that they're definitely back together.