you're the one - who sings it?

I only know one line for sure - from the chorus:

You're the one
Who sets my heart in motion...
You're the one...
..... (???) devotion...

Sung by a young female, 80s pop music style.
If anyone knows it - please, reply!
Thank you.

As I couldn't find a match to your lyrics, then here's a very wild guess, with different lyrics, but most of your provided words still in it:
Amy Grant - Baby Baby
http://www.youtube.com/watch?v=46QAjaCg5Yc