The First Dance
Our first dance was to Staind's "Tangled Up in You". We got some funky looks at first ("is that a rock song?!?"), but by the end of it, there weren't many dry eyes in the house.
Father & Daughter Dance
My dad and I danced to Loudon Wainwright's "Daughter". I deliberately picked a song that was upbeat (in the hopes that we wouldn't cry, and subsequently make me ball like a baby) and because the lyrics were so perfect (especially "there's my daughter in the water"...my dad giggled every time that line came up (I'm a marine biologist)).
Mother & Son Dance
My MIL and DH danced to Rascal Flatt's "My Wish". My MIL had been teary-eyed the whole day, but when my DH started singing along with the song (he's not a singer), she started laughing and wouldn't stop. :)