Answer:
I am a band that does not perform sing or act.
I may seem real but it always turns out I was never there in the first place... you only see me during a certain resting stage.
What building has the most stories?
I am what no man ever yet did see, which never was, but always is to be. What am I?
I start in little but I end in full you'll find me in half and complete.
What is lighter than what it is made of?