Betcha thought I was talking about Melissa Joan Hart, right?

This story centers around a girl named Louise. She deals with things like an annoying little brother, popular cheerleader girls who give her a time, and a troublesome teacher. But then one night, she gains cool witchy powers and a friend (Zelda Ruberstein, he little lady from Poltergeist.) helps her use and understand them. And when she uses them, that's when the fun begins.

Anyone seen or heard of this film? 

Here's the theme.