I'm trying to get chords to follow Diane Krall's take on The Look of Love.

Second line of the verse looks to me like:

Eb6 / C-6 / Dsus7 / D7 /
"a look your smile can't disguise"

The C-6 is the one I'm having trouble understanding and naming. It sounds like there is some
flirting (does it have a name) between C-7 and C-6. And I know Eb6 and C-7 share much in common.

I'd like to know so if I bring a chart to jam with friends it would make sense...
But knowing the correct theory wouldn't hurt either


Finally, I have found a cool signature with sufficiently dry humor.