Robby, from English Harmony or YearofEnglish.com says the following:
If you’re anything like the average foreigner out there, I guess I wouldn’t be wrong in saying that you normally don’t pay attention to English song lyrics; you just allow the music wash over your ears and touch you emotionally rather than with the actual meaning of words.
To tell you the truth, my friends, I don’t even pay conscious attention to words when I listen to songs performed by my fellow country-men (or women for that matter!), and sometimes it’s next to impossible to decipher those lyrics regardless of the language!
My new blogging friend, ElleninTokyo, also an ESL teacher recommended some other videos by Robby, because he’s a non-native English speaker (Latvian, living in Ireland). He’s posting new videos every day with recommendations for improving your English fluency. It’s great that he uses idiomatic English, including many common expressions in his videos. He strongly recommends that you learn all new vocabulary in context, and I’m seeing more and more information about how valuable this is, as well as how helpful it is to sing new words in English. Therefore, learning lyrics to English songs, finding out more about some of the words and phrases in these songs, and then singing the songs will be very helpful, in many different ways. I suggest that you watch the video and look for more of Robby’s ideas on his blog and YouTube channel. And while you’re at it, find a good song to learn and sing!