Model Sara Sampaio is a Lavender Delight!!

Sara Sampaio's a handful ... and a daredevil.

The Victoria's Secret model's enjoying an insane vacay with BF Oliver Ripley, in Saint-Tropez. They're aboard the "Ecstasea" -- extreme PDA's strongly recommended.

Come for the itsy-bitsy bikini ... stay for her flyin' ass on a hydro jetpack.