I like Xristina's Beautiful... not for weddings, but a good song...
Her latest, "Hurt" is in the same mold. And it's a great song with a heart-wrenching theme for those who have lost a loved-one or a close friend.
My List:
Fairly recent slow songs:
"Far Away", Nickelback
"Amazed", Lonestar
"Dance With My Father", Luther Vandross
"I Loved Her First", Heartland
Great Slows:
"Careless Whisper", Wham!
"Your Body's Calling Me", R. Kelly
"From This Moment", Shania Twain
"Have I Told You Lately?", Rod Stewart
Favorite Classics:
"Me & Mrs. Jones", Billy Paul
"At Last", Etta James
"I've Got A Crush (On You)", Sinatra~Streisand