Zeenat-Shashi: Satyam Shivam Sundaram

This one has to be on top of the list, not only for the era that it was executed in, but also because it features the Indian Greek Goddess of Bollywood; Zeenat Aman. 

Satyam Shivam Sundaram broke all barriers of Indian cinema, in which it showed Zeenat is a barely concealable saree draped across her bosoms, and some of the most classy, yet erotic moments in Bollywood's history!