Question: Airtel Super Singer 4 included a guest judge who was a veteran singer of what languages?
Sentence (from "Airtel Super Singer 3"): Airtel Super Singer 3 - "Thamizhagathil Brahmaanda Kuralukkaana Thedal - Immurai Ulaga Alavil", the third season of the "Airtel Super Singer" show, was a reality-based Indian singing competition in Tamil language that aired on Vijay TV.
Relevant evidence: No