Cool Music Band ripoff

The residents of the hills of Sprout have their favorite shows, but there's one show in particular they can all agree they don't like - that show is Fantasy Workers, and that's because it's a ripoff of The Cool Music Band (https://www.artstation.com/artwork/EzEBN4)

Like Cool Music, this show focuses on a band of four teens - Kurt, Newt (his real name is Kurt, too, so he used his nickname to avoid confusion), Hudsyn, and Gail - and like George's Musical Adventures, they live in a garage in Detroit, Michigan (with the Garage Gerbil, a puppet), where side characters (usually Michele, niece of inventor Uncle Ship Shape) come by with a problem that they must solve, through music, of course! Unlike Cool Music, they formed before they got a show, and are still playing to this day.

The Sprout gang dislikes this show also because, when compared to The Cool Music Band, Fantasy Workers has amateur camera work, bad script and songwriting, and annoying voices (both from the people AND Garage Gerbil).

Take a wild guess at what real-life show this is based on!