Chord/Tab song: Drifting

I am just going to list the chords, in order. Here goes:

[Cmaj7] [Cmaj7/G] [Fmaj7]
[Cmaj7] [Cmaj7/G] [Fmaj7] [Dm] [Dm7]
G Dm Dm7 G (repeats)

Then at the ?ooohhh? part it goes ?.

[C]Ooooh [C/Bb] [Ab]oohh''[Db(9)]'. [Db]

[Ab]oohh '''[Db(9)] [Db]

[Gb]Oohh''?.. [Eb]oohh'?[Ab]'?. [Db(9)][Db]

[Ab]Oohh''''[G]'? [C]

Cmaj7: x32000 or x35453
Cmaj7/G: 332000 or 335453
Fmaj7: x03210 or x8 10 9 10 8
Dm: xx0231 or x57765
Dm7: xx0211 or x57565
C/Bb: x12010
Db(9): x43x44
Db: x46664 or x43121 or xx3121
Ab: 466544
Eb: x68876 or xx5343 or xx1343