Dhanush's song "Kolaveri Di" became a major hit in 2011 in India, though many other songs like "Bhaag D K Bose", "Sadda haq", "Dhinka chika" and "Chammak Challo" were also popular. The music world lost several legendary artists that year, including Pandit Bhimsen Joshi, Bhupen Hazarika, Jagjit Singh, and Ustad Sultan Khan. A.R. Rahman's music for the film "Rockstar" was particularly praised. The year also saw some international musical acts perform in India.