I think few things are as beautiful and full of love as flashmobs.
I know that sounds silly, but as far as I know, most of these mobs aren't getting paid. They may be gaining acknowledgment as a whole but none of these people are getting famous or really furthering their careers from this. They do it because they truly love something; music, dancing, singing, and they want to share it. It may sound silly. But I think that is so special.
I hope this makes your insides happy