Singer

Nazia Hassan was an iconic Pakistani pop singer. Her song "Aap Jaisa Koi" from the film Qurbani made her a legend and pop icon in Pakistan and all of South Asia in the 80s where she is admired and loved even today, several years after her death.
In the early-1990s, Indian composer Biddu, with whom Nazia had collaborated on numerous projects, composed a song titled "X" and wanted Nazia to provide lead vocals for it. However, Nazia turned the offer down. She told song-writer and music director Biddu that she could not bring herself to sing something that was likely to offend Pakistanis.
The song was eventually offered to Indian singer Y. The song was a huge success....

Which Song? Also Id the Singer 'Y'...