Airtel Super Singer 4 included a guest judge who was a veteran singer of what languages?
L. R. Eswari Lourde-Mary Rajeswari Eswari (L. R. Eswari) is a veteran playback singer of the Tamil cinema, Telugu cinema, Malayalam cinema and Kannada cinema industries. She also sang in other languages like Hindi, Tulu, and English.
Hemanta Mukherjee Hemanta Mukherjee ((16 June 1920 – 26 September 1989); often credited as Hemant Kumar outside Bengal) was an Indian playback singer, music director and film producer, who sang in Bengali, Hindi and other Indian languages. He is also the greatest artist of Rabindra Sangeet. He won two National awards for the category best male playback singer. He is often credited as one of the greatest Indian singers of all time for his unparalleled manly voice.