She is known for vocalizing popular songs like, "O Maina Na Jane Kya Hogaya Kahan Dil Khogaya", "Pal Pal Jhoomun Jhoom Ke Gaun", and the film lullaby, "Raaj Dularey, Meri Ankhiyon Ke Taray".

[1][2][3][4] Kausar began her singing career in the early 1950s and was introduced by the film producer Agha G. A. Gul and rose to fame when she sang for Master Inayat Hussain and G.A.

While Qatil is best known for the Iqbal Bano's sad melody, "Ulfat Ki Nai Manzil Ko Chala", Kauser held her own with a love solo, "O Maena, Na Janey Kia Ho Gaya", which was filmed on Sabiha Khanum.

[1] However, her versatility as a playback vocalist was demonstrated in two superhit films released in 1957; Waada and Saat Lakh.

She performed the tragic song "Sitamgar Mujhe Bewafa Janta Hai" for Saat Lakh.