Gothamist had this video posted last week, which it picked up from Laughing Squid. I think I've overdosed on cute animal videos, but this is really something. Someone had their wedding at the Mystic Aquarium, and they hired Connecticut Mariachi to play it. After the wedding, they serenaded Juno the Beluga whale in her tank, and she (seriously) danced for them. Gothamist describes it as 1:45 of pure happiness: http://www.youtube.com/watch?feature=player_embedded&v=ZS_6-IwMPjM
Link to Gothamist in title.