Top 10 soundtracks
1.Sixteen Candles
2.Footloose
3.Grease
4.Grease 2
5.The Wall(Pink's Floyld)
6.Saturday Night Fever
7.The Rocky Horror Picture Show
8.Fast Times At RidgeMont High
9.Rock And Roll High School
10 Trick or Treat

Pink Floyd's "The Wall" album was not a soundtrack, even though a movie was made of it based on the album. But it didn't qualify it as a soundtrack.