This song by Rachael Yamagata is in Eb.
These are the “cheat” chords I played…
Part 1a: Eb - Eb/F - Eb/Ab - Eb/G (x2)
Part 1b: EbEb - Ab/F - Ab - Ab/G (x2)
Part 1c: Bb - Bb/Ab
Part 2a: Eb - Bb/D - Cm7 - Cm7/Bb
Part 2b: Ab2 - Bb4 - Cm7 - Bb/D
Part 2c: Ab - [...]
