Not a bad selection: http://www.huffingtonpost.com/2011/05/18/may-21st-doomsday-songs_n_863869.html#s280638&title=Tchaikovsky_1812_Overture
My contribution would be this one. No panic, no hysterics, just a bottle of champagne and a cool rooftop from which to watch it all go down with someone you love: http://www.youtube.com/watch?v=02TUsZzF6es