OK, it may have been a corporately sponsored Flash Mob BUT still cool – here’s the info that come with it:
On the 130th anniversary of the founding of Banco Sabadell we wanted to pay homage to our city by means of the campaign “Som Sabadell” (We are Sabadell) . This is the flashmob that we arranged as a final culmination with the participation of 100 people from the Vallès Symphony Orchestra, the Lieder, Amics de l’Òpera and Coral Belles Arts choirs.
Over 44 million views….
(H/T: Independent Journal Review)