It's playing on and on in my head :
Gogol Bordello | Start Wearing Purple
E porque é que ninguém usa roxo neste vídeo? Eis a explicação que encontrei (muito boa!):
The song is about his girlfriend, telling her to start wearing purple because the old senile lady who lived next door did every day...head to toe. Therefore, nobody is wearing purple because they are not on that level of crazy.