Just the ending song from Game of Thrones 3x03. There aren't too many songs in the book, and i liked how HBO took care of them and tried to include some songs in the series. And they sound GREAT!!! If you are a game of thrones fan i'm sure that you will be pleased with them:
The bear and the maiden fair
http://www.youtube.com/watch?v=4nOcdvjmiT4
The rains of Castamere
http://www.youtube.com/watch?v=z4FFQWdif6w
Also, despite that they take care about these details, i'm also very disappointed with the plot adaptation. I know that it can't be a word by word adaptation, but i don't know why they have to change or just make up new stories, ig