I think I will have to find some kind of dance music that is popular at the time of the flash mob, as the music tends to have an up-beat sound, and people tend to be dancing and not singing. However, this will open up to a wider pool of performers since many people can learn a choreography, but not everyone can sing. Music choice I will not be able to figure out until the start of the planning, since music choice can change over a month, and you do not want to be dancing to a song that is already out-dated.