BBC has recently done an “Impossible Orchestra” of well-known musicians and singers for a blended version of the Beach Boy’s song God Only Knows. (from ’66, 48 years ago) That’s London’s Alexandra Palace Theatre, home of the first-ever BBC broadcast nearly a century ago. And a lot of special effects.
http://www.youtube.com/watch?v=XqLTe8h0-jo#
The main performers (though they left off the conductor)
And a Behind the Scenes:
http://www.youtube.com/watch?v=vp5bVdXOLs4
Sales of the song will benefit BBC Children in Need.