 Complete the following phrase:  Gabrielle Christina Victoria Douglas born December 31, 1995 is a retired American artistic gymnast. She is the 2012 Olympic all around champion and the 2015 World all-around silver medalist. She was a member of the gold-winning teams at both the 2012 and the 2016 Summer Olympics, dubbed the Fierce Five and the Final Five by the media, respectively. She was also a member of the gold-winning American teams at the 