Actually more of a musical; but the soundtrack does feature songs not in the film, and there are songs in the film not sung on screen. PLUS it's too damn good to leave out!
I was unable to find any clips from the movie so here's a busk from Hansard, the ultimate buster.
Stehako's rating:
13 7.8
8. She's The One - Original Soundtrack,Tom Petty,Tom Petty & the Heartbreakers
Tom Petty and the Heartbreakers
The best example (unfortunately) I could give is the trailer, which features the song, "Walls" and mentions the contribution by TP & the HBs
Here's the trailer to the recent and fantastic film, which features one of the many soulful and yes, fantastic songs that accompany the film throughout.
Phoenix provided the music for Sofia Coppola's most recent film "Somewhere" but a soundtrack was never released...
UPDATED APRIL 2011
Films that called for one artist to create the melodic mood for the story.
Before you protest, I know some of these don't have have only one artist. Some that are like that are at least dominated by that artist or are all produced by that artist.