mai hu umar khayam pitu hu har sham 
jiska naam hai duniya wo hai meri gulam 
mai hu umar khayam salam huzur salam 
jaam piya jo ik tikha pahuch gaya mai america 
sath me thi miss kola has ke mai usko bola 
o my doll hay teri chal ye gore gore gaal 
hamko tere piche firte firte ho gaye kayi saal 
ab to keh de yes yes yes ab to keh de yes yes yes 
mai hu umar khayam pitu hu har sham 
jiska naam hai duniya wo hai meri gulam 
mai hu umar khayam salam huzur salam 
pi ke mai ik jaam pahucha kabristan 
o dekhi ek hasina jol thi shane iran 
aa mere pehlu me aa aa aa aa aa 
aa mere pahlu me aa tujhpe mai kurban dilbar 
ho ja mahrban dilbar sari duniya du luta 
aa aa aa aa aa aa mere pahlu me aa aa aa aa 
mai hu umar khayam pitu hu har sham 
jiska naam hai duniya wo hai meri gulam 
mai hu umar khayam salam huzur salam 
jaam piya jo nashila pahuncha kongo mai rangila
mil gayi ek rangili naam tha jiska lushila 
lushila lushila lushila dekh use mai kanp gaya 
sungh mujhe koi saanp gaya
accha hai atka hai are khatka hai ae bhatka hai
ae jhatka hai satka hai matka hai latka hai
atka khatka bhatka jhatka satka matka latka latka latka latka

 
Many times they don't list many singers and cast members in the movie
credits. So it would be useless depending on the credits. Listen properly,
you can easily guess its the lovely Usha singing here with Mahendra Kapoor.