Tu Kahan Yeh Bata Is Nashali Raat - M Rafi - Tere Ghar Ke Samne (1963).

After years of rivalry, two wealthy men, Lala Karamchand and Lalal Jagannath, decide to build their individual bunglows - the trouble is the Architect for both the bunglows is Lala Jaggannath's son Rakesh Kumar, and the bunglows are opposite to each other. To complicate matters, Rakesh and Sulekha, Karamchand's daughter, have fallen in love; are aware of the existing animosity between their families, and comically juggle their lives to meet their dads' expectation. REFERENCE: Tere Ghar Ke Samne (1963) http://www.imdb.com/title/tt0057568/plotsummary

Tu Kahan Yeh Bata Is Nashali Raat

URL: http://www.youtube.com/watch?v=ivKiXsfD-qI&feature=fvw

Mere Dil Mein Jo Hota Hai - Lata, Kishore & Rafi AAP KE DEEWANE (1980)

Ram and Rahim are childhood, inseparable friends. They complete their schooling, and enroll in an hostel to complete their education. One of their colleagues, Kundan frames them for molesting a girl, and has both rusticated. Without any means to survive, both masquerade as a male and a female, and get employed as tutors to a wealthy young lady, Sameera. Both fall in love with Sameera, and both think that she loves him and him only. Sameera must now decide who to chose. REFERENCE: Aap Ke Deewane (1980) http://www.imdb.com/title/tt0178195/plotsummary

Mere Dil Mein Jo Hota Hai - Lata, Kishore & Rafi AAP KE DEEWANE (1980)

URL: http://www.youtube.com/watch?v=Vu42i_Y4Zns

URL: http://www.youtube.com/watch?v=NbW4F_hnZk4&feature=related