Gwyneth Paltrow joined Jerry Seinfeld yesterday at his wife Jessica's Baby Buggy charity event at the Balenciaga shop in East Hampton. The actress is a regular at Jessica's philanthropic parties — she wore her Summer whites for the bash in 2008. Gwyneth is in the midst of a vacation with her children, Apple and Moses, and she broke out her bikini for a recent afternoon at the beach. She'll need all the rest she can get before heading out to promote her movie Country Strong ahead of its opening later this year. Gwyneth stars as a singer in the film, and we just got a listen to one of her songs.