I would do a search on the internet for wedding songs (not just entering and exiting songs). I know at my cousin's wedding they sang "Keeper of the Stars" but that might be too country for some (although it doesn't have to be). At another wedding I attended once they sang "From this Moment" by Shania Twain.
Those are the only songs I remember hearing...so the rest must not have been memorable. LOL!
Threaded Mode