Article continues below advertisementRosie Huntington-Whiteley glistened in gold during a lavish affair in Sydney, Australia.The model, 38, donned an Armani Prive backless gold gown covered in crystals while attending the Vogue Summer Ball at the Sydney Opera House on Friday, February 13. The star accessorized with yellow diamond earrings by Tiffany and Co. and wore her blonde locks in loose waves.Huntington-Whiteley took to Instagram on Sunday, February 15, to share behind-the-scenes snapshots aboard a yacht on the way to the event.