This song by Barry Manilow starts in G and climbs gradually a semi-tone at a time to Bb.
Part 1 and 2 are in G, Part 3 and 4 are in Ab, Part 5 is in A, and Part 6 is in Bb.
These are the “cheat” chords I played…
Part 1a: G(add2) - Em7 - Am7 - [...]
