Hemalata:She sang many Hindi songs in the 70's. She won the Filmfare Best Female Playback Award for her classical rendition "Tu jo mere sur main" in Chitchor.
My all time favourite song of hers is "Akhinyon Ke Jharokhon Se"
http://www.youtube.com/watch?v=KqpIIaCJggY
Runa Laila: A singer of Bangladeshi origin she has predominantly sung in Bollywood in the 70's.
My favorite song of hers is "Do Dewane Shaher Main" from the movie Gharonda:
http://www.youtube.com/watch?v=F4T8l22NM2c
Aarti Mukherjee: A bengali playback singer won the National Award for the her song Do Naina in Masoom
Here is the link to the song for which she won the National Award.`
http://www.youtube.com/watch?v=39jx3RecIEk
Preeti Sagar: She also sang in Bollywood and won the Filmfare for Best Female Playback singer for the folk song Mhare Gaon from the movie Manthan.
My favourite song of hers is "My Heart is Beating" from the movie Julie
http://www.youtube.com/watch?v=VfEg9qSvo-s
Sulakshana Pandit: She is a Bollywood singer and actress. She won the Best Female Playback singer award in 1975 for "Tu Hi Saagar Hai Tu Hi Kinara" in Sankalp.
One of her numbers that I like is "Somwar ko Hum Mile" from the movie Apnapan.
http://www.youtube.com/watch?v=YqcuByLrz5Q
Sharda Ranjan Iyengar: She is from Tamil Nadu and sand in Bollywood in 60's and 70's and won the Filmfare for Best Playback Singer for the cabaret "Baat Zara Haiin Aapas Ki" in Jahan Pyar Miley in the year 1970.
My all time favourite is "Titli Udi" from the movie Suraj
http://www.youtube.com/watch?v=1MtDOFXjFKQ
Suman Kalyanpur: She had a extremely melodious voice but was always overshadowed by Lata Mangeshkar.
It is sad that a singer with such enormous talent did not get her due.
My favorite song of hers is "Tumne Pukaara Aur" from the movie Rajkumar
http://www.youtube.com/watch?v=inL24bZ_n1o
Chitra Singh: Mainly a ghazal singer and wife of late ghazal maestro Jagjit Singh. Her rendition of Yeh Tera Ghar Yeh Mera Ghar with her husband will always stay fresh in our minds.
Here is the link to "Yeh Tera Ghar" from Gharonda
http://www.youtube.com/watch?v=UOMjKWrfI0U
Reshma: She is well known folk singer of Pakistan and sang "Lambi Judai" from movie Hero
Here is the link to "Lambi Judai"
http://www.youtube.com/watch?v=7nX_9ylMytU
Salma Agha: is a singer and actress from India who sang and acted in Indian films in 1980s and early 1990s. She won the Filmfare Best Female Playback Award in 1982 for the song "Dil ke Armaan" in Nikaah.
Here is one my favorites of hers "Faza Bhi Hain Jawaan":
http://www.youtube.com/watch?v=iE2aZEr0EBY
Nazia Hassan: She was an iconic pop star from Pakistan and sand the popular song "Aap Jaisa Koyi"
Here is the link to "Aap Jaisa Koi"
http://www.youtube.com/watch?v=5o5C1yUlx6w
Parvati Khan: She was a pop singer who sang the song "Jimmy Jimmy Aaja" in the Bollywood movie Disco Dancer which won a Gold Disc award.
Here is the link to the song from Disco Dancer
http://www.youtube.com/watch?v=zLPbrSjiJI8
Vani Jayaram: She is a prominent Indian female playback singer. She has thrice won the National Film Awards for Best Female Playback Singer. She is acclaimed for her in-depth knowledge of Indian classical music.
I love the song "Bole Re Papihara" from the movie Guddi and here is the link to it: