Rafi and Lata in the 50s and 60s.
Rafi and Lata were the premiere singers of Indian cinema and most of the composers relied on them for the success of the songs. In the film Baiju Bawra, Rafi's song "tu ganga ki mauj", composed by Naushad and picturised on Bharat Bhushan became successful. The film had classical songs involving legendary ragas used by Naushad.
Rafi and Lata had sung many duet songs in that age. The rest of the article is available in http://stationhollywood.blogspot.com