If this isn't endorsement enough for the Goop detox, we don't know what is. Gwyneth Paltrow hit the beach in Cabo San Lucas, Mexico this weekend, showing off her incredible physique in a barely-there bikini. The 42-year-old mother of two (we can't believe it either) was fresh off the press tour for her new film, Mortdecai, and enjoying some much needed downtime. WATCH: How to Get Bikini Ready 2016 InStyle News Channel The Tone It Up Girls Demo How to Get Bikini-Ready Abs Karena Dawn and Katrina Scott, the ladies behind the Tone It Up lifestyle plan, meet with InStyle's Kim Peiffer and demonstrate how to get into bikini-ready shape. Watch the video to learn easy-to-replicate moves that'll tone your abs right at home. Paltrow was in Cabo along with her two children, Moses and Apple, to celebrate a friend's birthday. The trio soaked up some sun on the beach on Saturday, where the actress donned a pale yellow patterned bikini top paired with ruffled cream bottoms, a long body chain, and aviator sunglasses. Talk about a chic beach look! See more celebrities in bikinis in our gallery. PHOTOS: Celebrities in Bikinis