Blake Lively’s Outfit for Her “Mom’s Night Out” Looks Totally Different from the Back -—Check out the unexpected yet totally sexy detail when she turns around.

Blake Lively enjoys 'Mom's night out'. The 30-year-old actress flashed a hint of flesh in a backless pink jumper and green leopard print trousers as she celebrated the opening of the Ashley Longshore windows at Bergdorf Goodman.