Answer:
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
I am always in front of you, but yet I am never here. What am I?
I cannot be felt seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
Fashions change, but what can a person wear that is never out of style?
No matter how little or how much you use me, you change me every month.