Academy Award winner AR Rahman is all praise for Chennai's 13-year-old musician Lydian Nadhaswaram, who won one million dollars for his piano performance in the first edition of American Reality Show "The World's Best". AR Rahman called the young prodigy an "ambassador" for Chennai and India. Lydian is also a student of Chennai-based KM Music Conservatory, that Rahman runs. NDTV caught up with the legend and the young prodigy.