The United States has a new Olympic gold medalist in the middleweight classification and she's a teenager with a sassy attitude.  17-year-old Claressa Shields even stuck her tongue out at Russia's Nadezda Torlopova before her 19-12 win.

Shields had all the right moves to beat her opponent Thursday.  The Associated Press is reporting her style was free-spirited and described her strength as brute.

Shields was even cocky enough to stick out her tongue at Torlopova in the final round, after dodging some punches.

The teen won America's only gold medal for boxing.

Shields is from Flint, Mich., and is new to boxing, having been in competition for less than two years.