 Kumar did playback for Naseeruddin Shah in the film "Hero Hiralal", which was famous as well.His duet "Yeh Kismat Hai Kya Kisne Dekha Yahan" with Alka Yagnik from "Ghar Ka Chirag" became popular in 1989.Soon after his father's death, Kumar and his half-brother Sumit Kumar released the album "Dui Kishore" as a tribute to Kishore Kumar.