Nothing, but he can't criticize Taylor's lyrics (which are actually good) or Katy Perry's lyrics (which are pretty decent) when he enjoys an artist that shouts "I don't wanna go to school I just wanna break the rules!". A mess.
And you're not suppose to try to break a habit when you're about to be at home all day the entire Summer with nothing to do. You just break habits by setting them when busy and having other stuff to do such as the school year.