By Lesley Savage
Updated June 06, 2010 at 02:37 PM EDT
Credit: Kevin Winter/Getty Images

Image Credit: Kevin Winter/Getty Images Sandra Bullock made a surprise appearance at Spike TV’s “Guys Choice” awards on Saturday night — her first public appearance since her split from husband Jesse James and the adoption of son Louis. The 45-year-old actress was there to accept the “Troops Choice” Award for Entertainer of the Year, chosen by members of the military. Looking radiant in a sleek black leather dress, Bullock was presented the award by Robert Downey, Jr. and received a standing ovation from the audience at Sony Pictures Studios.

“Let’s be honest here, just for a moment. We’re all going to be honest, right?” Bullock joked. “Did I win this for being entertainer of the year, or did I win this because of the spectacular I.E.D. [improvised explosive device] explosion that became my personal life?!”

Bullock is also expected to show at tonight’s MTV Movie Awards where she is to receive the Generation Award. Her appearance at “Guys Choice,” which will eventually air on June 20, was especially noteworthy because Spike aired her ex’s short-lived reality show Jesse James is a Dead Man.