There was a time in the late 70's and early 80's when the Nitty Gritty Dirt Band went by simply, the Dirt Band. Why they dropped "Nitty Gritty", I'll never know.
As it is, the Dirt Band managed just a couple of crossover pop hits during this period. The first was "An American Dream", released in 1979. The female voice heard on the track belongs to no less than Linda Ronstadt, who unfortunately wasn't availble when the Band made the video.