Actually, turning on the radio or putting on an English Music CD might just be one of the best ways to retain or remember vocabulary and grammar that you hear in the music lyrics .
According to BPS Research Digest, as sighted in the May 2008 addition of PSYCHOLOGIES Magazine, the answer to the age old question of learning a language, "might lie in a song...The researchers concluded that we find it easier to remember words if they're set to music, partly because it's more emotionally engaging, but also because the words are structured in a way that makes it easier for us to 'segment' the information and store it in our memories".
So turn up your speakers or put on your headphones and prepare to learn English with music.