Bella Hadid's St. Barts Bikini Bod Is On Point!

Bella Hadid dominates more than just high fashion catwalks -- she took her model game to the beach down in St. Barts ... like every other famous person.

The 19-year-old smoke show is hanging with friends in the Caribbean ... and most likely celebrating her recent Model of the Year award.

Question: Are non-celebs even allowed on St. Barts?!!