Something Beautiful is a great song. I remember during a time when I was studying Song of Solomon and asking God to make things clear to me, I heard that song one day. When it says, "It's a kiss without any shame...something beautiful", God showed me that that was what the verse in S.O.S. was referring to when it talks about him being her brother and they could be open in their affection.
For me, there isn't really a song I'd sing to someone or have them sing to me.
I do have my wedding song picked out. It's "The Gift" and the version I like is the one by Collin Raye. The song I sing to myself is "I'm Moving On" ... it gives me hope.
Zephaniah 3:17 says that the Lord rejoices over us with singing. That is a song I'd love to hear.