It depends how advanced your Russian is.I used to learn Russian at school many years ago and forgot a lot since then. Now, I decided to reactivate it and listening to Russian songs on my mp3 on the way to and from work is an excellent way-the language keeps coming back. Obviously it requires some effort, checking the lyrics and looking up some words in the dictionary,but the repetitive element works wonders.And it's so enjoyable! I listen to Vysocky(but his lyrics can be difficult) and a bit of Bichevska , Bielaya Gvardia(they are very clear and easy to understand) and I'm most grateful to Olga, who recommended BG (great!) and Zemfira.I also listen to Splin but as somebody said you can't expect their lyrics to make sense(I have no idea why?)-but the music is very good. I suppose it all depends on your taste for music-mine may seem old-fashioned to you!