Fad-fans
Fad-fans are individuals who follow trends and what's popular based on the number of other people following something. For example, they may follow a recording artist simply because millions of other people are following them in order to feel like they are a part of something huge, as it gives them a false sense of self-worth. Fad-fans are like culture zombies who fear voicing their true opinions due to them not being popular or well known. They tend to abandon artists for the next popular or hot trending artist or item.
Mike follows the music of popular mainstream artists because he's one of those fad-fans who prefers the opinion of the masses instead of his own.