What actress-comedian in Aap Ki Khatir is also a playback singer?
Aap Ki Khatir (1977 film):  The stars are Vinod Khanna, Rekha, Nadira, Helen, Tun Tun and Om Shivpuri. Tun Tun: Tun Tun (11 July 1923 – 24 November 2003) was the screen name of Indian playback singer and actress-comedian, Uma Devi Khatri, who was called "Hindi cinema's first-ever comedienne".
Tun Tun