This song by Christina Perri is in Bb.
Part 4 is the interlude.
These are the “cheat” chords I played…
Part 1a: Eb2 - Bb/D - Gm7 - F/A - Bb2
Part 1b: same as Part 1a
Part 2: Cm7 - F - Gm7 - F
Part 3a: Bb2 - F/A - Gm7 - Gm7/F
Part 3b: Eb2 - F4 - F
Part [...]
