India, Dec. 28 -- Celebrating Padma Vibhushan Ustad Ghulam Mustafa Khan's legacy, four of his celebrated proteges AR Rahman, Hariharan, Sonu Nigam and Shaan will perform on the day. "We have designed this evening as a journey. There are special segments featuring Rahman performing with Hariharan, Sonu with Shaan individually, followed by a Sufi set by Rahman," said Rabbani Mustafa Khan, Ustad's son. He and his three brothers Murtuza Mustafa, Qadir Mustafa, Hasan Mustafa, and nephews Faiz and Zain Mustafa, all musicians, have curated a piece as well. "This festival is our way of celebrating Ustadji's life, teachings and his unparalleled contribution to music," he added. Khan (1931-2021) was an Indian classical vocalist from the Rampur-Sahaswan Gharana, celebrated for his mastery of Hindustani classical music and versatility across genres (khayal, thumri, ghazals). "Our guru lives inside us forever. I feel his presence. He left a family for me in the form of his children and his students. Performing together for Haazri, will be an emotional experience," said Nigam in a press release....