Summer is definitely upon us!

Summer is definitely upon us! This week, Victoria's Secret model Behati Prinsloo shows off her pert derriere as she does an awesome handstand, on a surfboard no less, "Entourage's" Adrian Grenier takes in the sights from the beaches of Cannes and Hailey Baldwin escapes the heat with a cold shower ... outside! And, Lindsay Lohan takes a sexy selfie with her glam squad, Selena Gomez shares the sweetest throwback pic with her equally beautiful mama and Tia Mowry posts the cutest family photo with her "3 Amigos."

And, Sam Smith gets in a fight with his cat ... and loses, Mandy Moore goes scuba diving with her rarely-seen sister and Kate Hudson enjoys some brew while beer tasting in Germany!