The 24-year-old taekwondo black belt beat out 50 contestants for the top spot.
First runner-up was Miss North Dakota Audra Mari.
Miss USA 2013 Erin Brady Previews the 2014 Show
Rumer Willis, Lance Bass and Ian Ziering were among the celebrity judges.
This is the first year the show has implemented a "Save the Queen" Twitter vote for viewers at home.