She flipped, tumbled and smiled her way into our hearts in 2012.
And now Gabby Douglas ends the best year of her life by turning 17 years old. That's right, it's the Gold Medalist's birthday! Send in your very best wishes to the Olympian now!
Douglas became the first American in history to win the all-around individual title at this year's games. Among her rewards?
Other famous folks celebrating a birthday on December 31 include: PSY (35), Val Kilmer (53), Ben Kingsley (69) and Anthony Hopkins (75).