The country and gospel quartet the Oak Ridge Boys are American Music Legends. They have platinum and gold albums, Grammys, CMA, a Dove GMA Awards. This lineup is in their 40th year of touring and they celebrated at the Missouri State Fair on Wednesday night (Aug. 14).

Before the show even began, the B2 Stealth Bomber flew over the fairgrounds celebrating an anniversary of its own. Elaine Horn,the mayor of Sedalia, declared Aug. 14 to be "Oak Ridge Boys Day" in honor of their musical achievements, and the Oak Ridge Boys themselves presented State Fair Director Mark Wolfe with a commemorative plaque celebrating their 40th anniversary tour. Even Governor Jay Nixon was in attendance!

Then the music began, and the party really got started! Check out all the pictures below.