Timberlake Parties at Marines Ball

Maybe it was Kelsey De Santis' beefcake Marine brethren in the background, but Justin Timberlake didn't welch on his promise to take the martial-arts expert and corporal to last night's Marine Corps Ball in Richmond. Timberlake grudgingly agreed to go after De Santis posted a video invite on YouTube while he was promoting Friends With Benefits this summer; costar Mila Kunis backed out of a similar date Timberlake pressured her into. Regardless, "We all brought sexy back!" one Marine tells People. "Justin seemed to have a good time, and it was great to see him there." (More Justin Timberlake stories.)