Nazia Hassan's debut in 'Aap Jaisa Koi' introduced a fresh sound to South Asian music. Her voice was crystalline and modern, perfectly complementing Biddu's disco rhythm. The song became a global-sounding Hindi film track. It redefined pop music in the region. Decades later, 'Aap Jaisa Koi' remains a timeless classic, a testament to Nazia Hassan's enduring legacy.