Shadow singer

This weekend we are having a festival in the Institute where I work. In the daytime all the campus is full of people - families, kids, students... You can enjoy some snacks, buy some stuff... there is even a small flee-market. And in the evening there are some concerts. On Saturday there was a live concert of student's bands. One of the students from my lab was even singing some crazy songs ;-)) ...and of course many students, including even some faculties, were dancing their crazy dances :-D