The Uptown Bluegrass Band
From the "Monkey Hoedown/Curious George Clowns Around" episode (2012) of animated children's television series Curious George.
The Man with the Yellow Hat gets to sit in with them, for a hoedown near his country place. After George ruins his guitar trying to clean it, George and Allie make him a new one. Out of a tennis racket and birdhouse.