This movie was filmed at Hunter High School in West Valley City, Utah. Their school was the Hunter Vikings, but the real Hunter High are the Wolverines. The real Hunter High basketball team was the opposing team in the basketball game and were called the Wolverines. The movie was filmed in late 1995 and early 1996, which is why snow is present in some shots and Danielle Harris has visible breath when opening the door. Moonpools & Caterpillars was the rock band featured in the movie at the Winter Festival Dance. The movie shares similar elements with many other films also featuring the FreakyFridayFlip television trope.

Who is the band in wish upon a star? Let's have some stream of consciousness first.
To answer this question, we should know that: Moonpools & Caterpillars was the rock band featured in the movie at the Winter Festival Dance. So, the answer is Moonpools & Caterpillars.