Gisele Bündchen, who is preparing to welcome her third baby, seems the "happiest she's ever been," a source close to the model tells PEOPLE.

Pregnant Gisele Bündchen — who is expecting a child with boyfriend Joaquim Valente — shared an adorable video of her baby bump while reflecting on how to find happiness in life.

"She seems the happiest she's ever been. She's truly thriving." They added that the baby "has been a happy surprise" for the f

Gisele Bündchen has found her joy. On Wednesday, the pregnant supermodel—who is expecting her first child with boyfriend Joaquim Valente—shared an inspiring message about happiness while baring her baby bump in a bikini on the beach.

Gisele Bündchen surprised fans last year when news surfaced that she and her boyfriend, Joaquim Valente, were expecting a baby. Already a mom of two with ex-husband Tom Brady, Gisele has kept this pregnancy mostly under wraps—though that hasn’t stopped the paparazzi from snapping photos.

"You are the only one who has the power to create the life you want to live," the supermodel added alongside her video on Instagram.

Tom Brady is officially single as ex-wife Gisele Bündchen expects a child with new boyfriend Joaquim Valente. Brady, who shares two children with Bünd

In the Reel, Bündchen shared clips of herself walking along the beach, running through the sand and cradling her bump as she posed alongside a sunset. The supermodel could be see