Elizabeth Hurley has marked the end of her 'pretend vacation' – and she has certainly left on a high!The 55-year-old shared a bikini snapshot on Instagram on Sunday, and fans were blown away by her flat and toned stomach.MORE: 10 of the most unique celebrity engagement rings: Elizabeth Hurley, Katy Perry, Lily Collins and moreThe image shows Elizabeth sat by the water and sipping on a glass of champagne. She is dressed in a green bikini with her long hair falling down her back.