The Toreador Song from Bizet's opera Carmen. Philadelphia Opera flash mob at an indoor market. This is my very favorite!
youtu.be/bymQ0j4LcLYMy Favorite Things flash mob, Antwerp Station, Belgium
youtu.be/bQLCZOG202k
Surprise: To Life!
https://www.youtube.com/watch?v=KgZ4ZTTfKO8
Opera Philadelphia and the Wanamaker Organ (Macy's, Philadelphia) Hallelujah
https://www.youtube.com/watch?v=wp_RHnQ-jgU
FSU Marching Chiefs: Single Ladies 2014, Thriller 2009
https://www.youtube.com/watch?v=BoVl_PyJloo
https://www.youtube.com/watch?v=gE24M-hTxpc