rock stars release albums in bestbuy and itunes. put out HUGE singles. make big time music videos. perform on late night talk shows. perform on SNL. do the MTV VMA. the GRAMMYS. AMA awards. magazine cover spreads on Rolling Stone.
Thanks for this clear-cut definition of the word "rock star", what would we do without you?

I always thought rock stars go out and play rocknroll, but who am I to know?
