HELP!!!!

WHAT WAS THE NAME OF THE SONG THAT PANNA SANG IN THIS GALLA....? I REALLY LOVED IT WHEN A WAS YOUNGER... AND WHICH MOVIE IS IT FROM?

HELP ME GUYS...

agar tum na hote from the movie: agar tum na hote.....

agar tum na hote...
here is d lyrics!
Movie - Agar Tum na Hote
Singers: Kishore Kumar n Lata Mangeshkar

Hamein aur jeene ki chaahat na hoti -2
Agar tum na hote, agar tum na hote

(Tumhen dekhke to lagta hai aise
Bahaaron ka mausam aaya ho jaise) -2
Dikhaayi na deti andheron mein jyoti
Agar tum na hote, agar tum na hote
Hamein aur jeene ki..

(Hamein jo tumhaara sahaara na miltaa
Bhanvar mein hi rehte kinaara na miltaa) -2
Kinaare pe bhi to leher aa duboti
Agar tum na hote, agar tum na hote
Hamein aur jeene ki..

Hamein aur jeene ki chaahat na hoti -2
Agar tum na hote, agar tum na hote

(Tumhen kyaa bataaoon ke tum mere kyaa ho
Meri zindagi ka tum hi aasra ho) -2
Main aasha ki ladiyaan, na rah rah piroti
Agar tum na hote, agar tum na hote
Hamein aur jeene ki..

(Har ik gham tumhaara sahenge khushi se
Karenge na shikwaa kabhi bhi kisi se) -2
Jahaan mujh pe hastaa, khushi mujhpe roti
Agar tum na hote, agar tum na hote
Hamein aur jeene ki..