This video has been seen almost 9 million times, since last May. Thanks to Ray for sending me this.
Here's the description, on youtube.
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.