Salma Hayek -- Mama Mia ... That's Some Body! (PHOTO)

Salma Hayek is not one to flaunt her curves -- we rarely see her rocking little black bikinis -- which is why we're showing you these pics of her ... rocking a little black bikini.

Salma was yachting in St. Barts with her husband Francois-Henri Pinault over the holiday weekend.