Gwyneth Paltrow is one proud mama. The Mortdecai actress celebrated her son Moses's ninth birthday on Wednesday by posting a cute selfie to her Instagram. Gwyneth, who rocked a natural look with minimal makeup, smiled sweetly at the camera in the close-up shot. The blond beauty, who is also mom of daughter Apple with ex-husband Chris Martin, has been having a busy few weeks. After reuniting with Chris for a Spring break vacation with their kids [1], she was spotted partying with her new boyfriend, Glee cocreator Brad Falchuk [2]. See Gwyneth's sweet Instagram tribute to Moses below: