Lifetime preview song help?

Are you talking about the trailer? From what I've seen done with other movies, the songs in the trailers have nothing to do with what's in the movie. And that usually translates to - you'll never know. It's unfortunate. Often (IMO) the songs in the trailers are far better than the music in the movies, and worse is that you're lead to think you'll be able to find out more about that song if you watch the movie. A classic example is Stalked at 17. There was a HUGE uproar when that trailer aired, and then the song didn't appear in the movie. People are STILL trying to find out what song that was. :/