"Fade Into You" by Mazzy Star is not on the Cruel Intentions soundtrack (check the wikipedia entry on this), in fact it's not on any soundtrack, however, it is used in countless movies without being on the official Soundtrack CDs, such as
- Starship Troopers, and
- Angus.

It was used in an episode of Canadian TV Soap Riverdale though (in Season 5 Episode 1).

Thre are two music videos to Mazzy Star's "Fade Into You"
- Mazzy Star - Fade Into You (version 1: Original version)
- Mazzy Star - Fade Into You (version 2: MTV Desert version)

Here's a list of Mazzy Star songs that actually made it into soundtracks:
- Flowers In December, and
- Look On Down From The Bridge, in Best Laid Plans;
- Tell Me Now, in Batman Forever;
- Ghost Highway, in Love & a .45; and
- Rhymes Of An Hour, in Stealing Beauty.

It has also been used in a Coca Cola commercial, but there's little info on which one specifically.