Australia's Next Top Model star Simone Holtznagel flashes her bra in a see-through top

Simone Holtznagel sizzles as she strikes a pose in her 'birthday suit'

Celebrity PT Jono Castano goes public with new girlfriend Simone Holtznagel

Simone Holtznagel and Jono Castano look smitten during playful game at the gym