Fairly cheesy, naive and innocent 80's movie, with Helen and Christian Slater. Helen Slater starred in Supergirl (1984)...and I can see why.
Tagline:
"When you're seventeen, people think they can do anything to you. Billie Jean is about to prove them wrong."
"A Texas teenager cuts her hair short and becomes an outlaw martyr with her brother and friends"

IMDB says: "Both she and Christian Slater achieved early success in their careers playing brother and sister in The Legend of Billie Jean (1985), leading many to believe they were real-life siblings. Although they share the same last name, they are not, in fact, related."
Soundtrack for the movie included Rebel Yell by Billy Idol and "Invincible" by Pat Benatar. So yeah, very 80's. Not quite "Footloose" or "Quicksilver" though, haha.
Rating 6/10.
Pat Benatar - Invincible:
http://www.youtube.com/watch?v=gDvt5LL1tyw