[Flash 9 is required to listen to audio.]
Langley Schools Music Project - “Calling Occupants of Interplanetary Craft”
Another two-fer: a chorus of Canadian schoolchildren singing a song by Klaatu, the Canadian band most famous for not being the Beatles in disguise no matter how much the music press wanted them to be. The Carpenters went on to have a hit with the song, but for my money, this is the version we should be greeting the aliens with.