Although just listening to a song in English can be a good way of really learning the words of the chorus in an easily memorable way, if you want to really get something out of listening to English music you will need to take some time to read the lyrics of the song with a dictionary. If the lyrics are not given in the CD booklet, you may be able to find them on the internet, but please note that some lyrics sites deliberately put a few errors into their lyrics for copyright reasons. Once you have read and understood the lyrics, if you then listen and read at the same time, this can be a good way of understanding how sounds change in fast, natural, informal speech.