Query: By what two genres are modern pop songs heavily influenced?
Context: With the mixture of radio friendly AC tunes with some rock and pop fare also landing on the pop charts, mainstream songs won over many critics in the need to define AC, and appeared to change the tolerance and acceptance of AC music into mainstream day to day radio play. Part of the reason why more and more hot AC stations are forced to change is that less and less new music fits their bill; most new rock is too alternative for mainstream radio and most new pop is now influenced heavily by dance-pop and electronic dance music.