One of the more popular teenage musicals in the late 80s turned out to be Teen Witch, a movie I didn't know much about until decades later. I know I wasn't the intended audience in 1989, but I bet I would have actually had some fond feelings of if I had seen it. But it's still a very silly movie.
Read the review from September 2020 at https://wp.me/p9XNnZ-1pU