SUMMER ROMANCE IS RED-HOT!

Summer romances are making a big sexy splash, with bikiniclad SIENNA MILLER, 40, and her male model boyfriend OLI GREEN, 25, frolicking in the sea at Saint-Tropez as KIM

KARDASHIAN, 41, pines for

SNL beau PETE DAVIDSON, 28, who fled her Calabasas hideaway to film a flick in faraway Australia. Not to worry, she’s already planning a very sexy rendezvous in the land Down Under!