From the passage provided, extract the name of the last song recorded by Kishore Kumar

Context: By September 1987, Kishore Kumar had decided to retire as he was unhappy with kind of songs and tunes being made by music directors and was planning to return to his birthplace Khandwa.

On 13 October 1987, his brother Ashok Kumar's 76th birthday, he died of a heart attack in Bombay at 4:45 pm. His body was taken to Khandwa for cremation. Kishore had recorded his last song, "Guru Guru", a duet with Asha Bhosle for the film Waqt Ki Awaz composed by Bappi Lahiri for Mithun Chakraborty and Sridevi, the day before he died.

Recalling the day of Kishore Kumar's death and his last lines before he took his last breath, his wife Leena Chandavarkar was quoted as saying: "On the morning of October 13, he looked pale and as though in deep sleep. As I went near him, he woke up and asked, ‘Did you get scared? Today is my holiday’.” That day he had several meetings at home. During lunch he told me that we’d watch the film River of No Return in the evening. A little later, I heard him move furniture in the next room. When I went to see what was happening, I saw him lying on the bed. Nervously he said, ‘I’m feeling weak’. I ran to call the doctor. He got angry and said, ‘If you call the doctor, I’ll get a heart-attack’. Those were his last lines. His eyes were wide open and he was breathing out. I thought he was fooling as usual but that was the end."

Answer: Guru Guru