Even before Gwen Stefani joined Blake Shelton on stage at Country Jam Saturday night (June 18), the singer got a birthday surprise. Shelton headlined night No. 3 of the four-day country and camping festival in Grand Junction, Colo.
Every time Blake Shelton steps on stage, one senses an unforgettable memory is about to be made. From The Voice, to the ACM Awards, to his tweets ... oh yeah, he's got some pretty good songs, too. Here's nine of our favorite unforgettable moments from country's favorite jokester.