In the film the watcher (starring james spader) What is the name of the song and performer playing when the police are visiting the homeless girl's mother?
It's a female singer and the Lyrics include: "now it's over like it never was before" ?

It would probably be either "Can't Say That," by Holly Light, or
"Driven to This," by Jacqui Lynn, as these seem to be the only
Two songs in the soundtrack by women. Here's a link that lists
The names of the songs in "The Watcher" as well as the artists
Who sang them:

The Watcher (2000/I) - Soundtracks