According to People.com, Justin Timberlake kept his promise to combat instructor Kelsey De Santis!This past summer De Santis sent Timberlake an invitation to be her date for the Instructor Battalion Marine Corps Ball, Timberlake said yes.  This past Saturday, he kept that promise.

"What I didn't know was how moved I would be by the whole experience, "

Timberlake posted on his website after the ball.

Check out De Santis's video invitation to Timberlake.