Justin Timberlake kept his promise to Corporal Kelsey De Santis and was her date to the Marine Corps Ball in Richmond, Va.

Us Weekly reports that Justin accepted De Santis’ YouTube invitation to the ball after encouraging his ‘Friends With Benefits’ co-star Mila Kunis to attend another Marine Corps Ball on Nov. 18 with Sergeant Scott Moore.

Looks like he had a lot of fun too. Writing on his website:

“I’ve met so many of my heroes — from Michael Jordan to Michael Jackson — and nothing makes me feel more honor and pride than when I get to meet one of you.”

Justin was not only in awe of the service men and women in general, but also of his date.

“For a short while, I had the opportunity to sit with Kelsey, get to know her and get a tiny glimpse into what her life as a Marine was like. She talked about her training in mixed martial arts with a passion, a discipline, and a respect. She seemed to me to be so humble and honest … Very cool.”

Justin was amazed at the Marines and the military in general after his experience.

“To all of you that serve every day for us … Ensuring our freedom, I say: My deepest gratitude to you … Last night changed my life and I will never forget it.”

Finally, Justin thanked his escort. (Get your Kleenex ready, everyone.)

“Thank you Corporal Kelsey DeSantis. Thank you for inviting me. And thank you for being my hero.”

Check out Justin's website for the full recap of the evening. What an amazing chance for him to get, and what a stand up guy to take part in the Marine Corps Ball. It's not everyday you hear of celebrities accepting YouTube dates.

Get the latest Hollywood Buzz weeknights with Jade at 7:40 and 10:40 on Mix 94.9