Everyone know that music is a great way to help you get better in a second language. I am a long time spanish language learner and know about 20 songs, most of them by a group called Estopa, by heart, for the most part. However, everytime broad melodies are part of a song, memorizing the lyrics becomes a little bit harder. I just recently, started listening to a rap/hip hop band called calle 13, and to me their lyrics are brillant. The remind me of Eminem so much, even though they sing and rap in different languages. My advice to English speaker, find, buy, download for free, watch on youtube etc, as many Eminem songs as possible. The guy is a straight lyrical genious. Even if you don't like rap, as I mostly don't, there are so many benifits of getting into some of his  songs. Your language pronunciation and vocab will soar. He speaks slow enough that he is quite easy to comprend. and each song has enough hooks to keep you coming back for me. I would suggest starting on youtube, doing a quick search for something like > Eminem with lyrics and watching 10 to 15 songs to find out which you are into, and then go back and watch again and again. Look up words in phrases in real time with www.wordreference.com open in a seperate window, and your language learning will get seriously better. Good luck!