My dad picked the perfect son to dance with me (and I had never even heard it). It was a huge surprise...he wouldn't even tell me, and the dj kept it a secret!! When we were dancing, he said beware, it's long (approx 4-5 min) don't listen to the words, we will both cry. I'll give you the cd and you can listen to it on the plane...which I did.
It was "If I could" by Ray Charles. I guess Barbara streisand wrote it and song it for her son (so I heard) and ray charles remade it...it worked perfect for us. I absolutely love the song, too!!! So either way, could me mom/son or dad/daugh. Unfortuanatley my hubbys mom wasn't at our wedding, but he danced w/my mom, instead and they danced to what a wonderful world.