Kim and Kourt flaunt their bikini bods as they celebrate Kourtney's 32nd in Punta Mita, Mexico with their guys: Kris, Scott, brother Rob and little Mason!
Itsy-Bitsy Yellow Bikini!
"She totally firmed up!" Kourtney's trainer David Barton tells Us of her incredible beach bod (shown off in a Mikoh two-piece).
Credit: Jason Winslow /Prahl/Splash News Online