the fact that, dharmendra told ,when he become produce his own film , all song sung by rafi , but before rafi saheb died in 1980 before he produce his film , thefore he took shabiir kumar the clone of rafi saheb to keep rafi saheb memories alive
pyrelal told lie because he use kishore more than rafi. rafi sang 367 song for L-P and kishore sang 402 under L-P music direction. only madan mohan didnt use kishore in 70 perioud
first line was written by shailendra and after first line he did suicide . after shailendra his child completed this song.