YouTube Versions of Choral Works

From Fred:
Pilgrim’s Chorus (with some additional choral music) http://www.youtube.com/watch?v=coLxM2hq_gA
Bride’s Chorus http://www.youtube.com/watch?v=Q-HwBGgBRFk
Anvil Chorus http://www.youtube.com/watch?v=tssCXwtAYkw
operatic version:  http://www.youtube.com/watch?v=QZN01_pAxro

Think we could do a flash mob of that?