Justin Timberlake parties with Kelsey de Santis at the Marine Corps Ball


Bringing sexy back to the ball! Justin Timberlake parties with elated U.S. Marines as promised

A night to remember: Justin Timberlake accompanied U.S. Marine Cpl. Kelsey de Santis to the annual Marine Corps Ball in Richmond, Virginia on Saturday

A night to remember: Justin Timberlake accompanied U.S. Marine Cpl. Kelsey de Santis to the annual Marine Corps Ball in Richmond, Virginia on Saturday

One lucky gal: The singer-turned-actor fulfilled his promise and arrived as the date of U.S. Marine Cpl. Kelsey de Santis who asked him via YouTube One lucky gal: The singer-turned-actor fulfilled his promise and arrived as the date of U.S. Marine Cpl. Kelsey de Santis who asked him via YouTube

One lucky gal: The singer-turned-actor fulfilled his promise and arrived as the date of U.S. Marine Cpl. Kelsey de Santis who asked him via YouTube

Man of his word: Justin kept his promise to attend the dinner and party

Man of his word: Justin kept his promise to attend the dinner and party