I've heard it tons, and I'm pretty sure it's Phil - but could be wrong.
I don't think these are the words but he really draws out one word each chorus.
Something like
"I belieeeeeeeeevvvvve in you,
blah blah blaaaaaaaah, blah blah.
All I neeeeeeeeed is you.
Etc.
Driving me mad (Yah I know, it's not a long trip).
Thanks,
Khyron