Standard (EADGBE)
-- through first verse
(G accents) -- through second verse
(D G accents) -- rest of the way
The G accents get more prominent after the first chorus.
"But now...
Chorus
"Weeeeeeeeeeee'll float
Take life as it comes..."
I think that Bbmaj7 is really nothing more than Dm with a Bb bass note (so Dm/Bb), but I
play it as shown below: