Liam Neeson, Annie Lennox, A.R. Rahman, Pia Toscano, Zubin Mehta and Fareed Zakaria and have joined previously announced participants Gloria Estefan, Sting, Andrea Bocelli, Josh Groban, Yo-Yo Ma, David Foster, DJ Alan Walker, Asif Mandvi, Nishat Khan, sisters Ranjani-Gayatri and Matteo Bocelli.