After reading the comments on this item I thought I'd clarify the details for anyone thinking of buying it. It's the piano sheet music with vocals and guitar chords. It has all the songs from the album except the bonus tracks (Disco Heaven & Again Again), and there's a range of difficulty, with some songs being very simple (eg Just Dance) and others are more challenging (eg Summerboy and Eh Eh). Obviously, songs like Brown Eyes which are less electronic-sounding, come out much better when played on the piano, but all in all it's worth buying if you want to have a go at playing these songs yourself.
Love Lady gaga so saw this and had to buy, was unsure what actually was as no detail what so ever so just assumed pictures. Came and turns out to be music score for all the tracks on the album. Opps just wished was a little clearer but sure i'll still use it.