Justin Timberlake attended Spike TV's 2012 Guys Choice Awards with a very special lady by his side, but it wasn't his new fiancee Jessica Biel.

JT actually opted to shared the evening with Corporal Kelsey De Santis, with whom the singer/actor also attended the Marine Corps Ball in November 2011. Fans may remember that De Santis asked Timberlake to be her date via YouTube video (see below), but it seems the tables were turned this time around.

According to Celebuzz, the 30-year-old star praised his date when he accepted the award for Entertainer of the Year. “Thank you for inviting me — even for one night — to something so meaningful,” he said, referencing the Marine Corps Ball.

Of course, Timberlake couldn't help but crack a joke from stage. He said to De Santis, “While you were enlisting, I was a put in a boy band. You remember that, I’m trying to forget it.”

JT wasn't the only A-lister at the event -- Emma Stone, Mark Wahlberg, Matthew McConaughey, Channing Tatum, Mila Kunis, Jeremy Renner, Malin Akerman and Julianne Hough were also on hand to celebrate the night. The 6th Annual Guys Choice Awards will air on June 9 at 9PM ET on Spike TV.

Watch Corporal Kelsey De Santis Invite Justin Timberlake to the Marine Corps Ball