Olympic gymnast Nastia Liukin has plenty to celebrate right now. Birthdays aren't just one day in the celebrity world, with the 30-year-old 5-time Olympic medalist today taking a leaf out of Kylie Jenner and Jordyn Woods' books. It's birthday week. Nastia's 1 million Instagram followers were greeted with stunning pre-birthday snaps on Monday, with the Moscow-born star celebrating her killer sense of style as she posed for outdoor photos in tight jeans. Nastia turns 31 on October 30. Check out the latest photos below.