Elena,for some famous songs, you could go to www.baidu.com and input the song title in Chinese, and a space, and the word "lyrics" in Chinese (Ge-Ci or 歌词). There you will find the lyrics in Chinese. If you're looking for lyrics in Pin-yin, it'll be quite impossible because we don't use Pin-yin among us. And for those not-so-popular songs, there might be a few incorrect characters in lyrics on net. Keep that in mind and don't trust everything. It's useful to start learning Chinese after famous songs, but it's not always a good idea because Chinese lyrics might be quite "constructed" than everyday speaking.