"O...Saya" is a wonderful collaboration between one the greatest film score composers and probably the most famous Sri Lanka-born singer of our modern time M.I.A. included in the Indian hit movie "Slumdog Millionaire". This song in particular is a fine example of how old India meets the modern times and still preserves its beauty.
Another songs that you can hear in the original soundtrack is the DFA remix of the M.I.A. hit single "Paper Planes". In the film you can hear the original version as well and the best thing is that both songs suit the whole atmosphere pretty well.
The rest of the album is a fine mixture between catchy Indian tunes, some fine beats and modern influences throughout the soundtrack.