This has gone straight into my "keepers" folder.
I LOVE this song. Very cool, laid back, stunner of a tune, brilliantly weird vocal stuff.
And the lead vocal is just magnificent. The intonation isn't always perfect, but personally I would keep it exactly as it is. Uru kind of "orbits" the notes anyway, and I think it sounds excellent.
Her voice has a beautiful tone to it - just a hint of rasp. In fact, she reminds me of Elvis Costello! (if that means anything to you)
The "ooh-ooh-ooh" and "come to me" bits are fantastic.
Things I would change:
Tame the hihat a bit!
Change the "chorus-y" synth sound - it doesn't sound great.
The hard-panned "ooh-way-day" bits aroun 2:15 are a bit out of tune, and could do with being re-recorded.
The lead vocal is a bit out from 3:50 ("I'm waiting")
Pull back the tom fills during the break down.
But can I just say again - I LOVE this song!
Hope this helps.
Cheers
Alastair
PS I know very little - feel free to ignore the above!