Sufi singer Ustad Pyarelal Wadali, who was one of the singers of the Wadali Brothers group, died in Amritsar at the age of 75 due to cardiac arrest on Friday. Known for their Punjabi Sufi music, the Wadali Brothers also sang Bollywood songs like 'Rangrez' from 'Tanu Weds Manu' and 'Ik Tu Hi Tu Hi' from 'Mausam'.