Kim Kardashian bodysurfs with The Pussycat Dolls' founder Robin Antin, who is 50, on the beach during Kourtney's birthday week in Mexico! The girls even styled up little Mason Disick in a hat that matched his mommy's, with an orange ribbon on it that matched his aunt Kim's swimsuit. Kim wore a bright orange bikini and walked on the beach with her nephew Mason and pregnant sister. The family was in Mexico to celebrate Kourtney's birthday. Kim looked very happy to be in the water.