I've been thinking about this a lot lately because I don't have any appropriate wedding songs, unless I want to start a mosh pit in the middle of the dance floor. I did find a few though, but the lyrics just have to be ignored and then it's pretty.
http://www.youtube.com/watch?v=vKG-NGRcncE This one wouldn't let me embed it. So here's the link.
I've been listening to Sick Puppies' album Tri-Polar and I don't know about you, but that song "Maybe" does not sound like it should belong on that album. In my opinion that song sounds like something Nickelback or some lesser band would do. Just saying.
Here is "Maybe" with a few other songs off the album.