Kate Moss  took a trip to St. Barts for a friend's birthday on Sunday, partying on a yacht in the crystal blue waters. Wearing a strapless bikini, she was all smiles as she hung out with her friends, laughing, sunbathing, and taking a well-deserved break from her busy schedule. Kate was recently announced as the face of Burberry's next fragrance campaign with Cara Delevingne , and she snapped an adorable selfie with the young model on the set. She also had a very busy February with the BRIT Awards  and London Fashion Week . Though her husband, Jamie Hince, wasn't at this big bash, he was by her side to celebrate her 40th birthday back in January , which she spent with a group of famous friends.