New Delhi, July 14 (IANS) Veteran singer-composer Bappi Lahiri on Friday released his new song "Dilli ki raat" from forthcoming film "Indu Sarkar". He said the song is a tribute to late legendary composer R.D. Burman."I come to Delhi very few times, but whenever I have been here I have received tremendous love from the people. Madhur's (filmmaker Madhur Bhandarkar) all movies are hit and I am a fan of all his films," Lahiri said at the launch."Around 1975 was the time when I became 'Bappi Lahiri' -- the singer. Through this song I got to relive that time. Before me it was Pancham Da's (R. D. Burman) era. This song is a tribute to him. People will get to hear something new in this song. I only sing one song in a year and with god's grace, every song becomes a hit," he added.Lahiri was joined by Bhandarkar, actress Kirti Kulhari and Miss India Tourism Ishika Taneja, who has appeared in the song."Dilli ki raat", sung by Lahiri and Anmol Malik, is a disco number complete with glittery crystal balls and reminds listeners of Lahiri's previous popular singles.Asked whether the single will be in sync with the content of the film, Bhandarkar said: "I wanted the song to be in sync with the story and do justice to the era, the film is set in. I am a big fan of Pancham Da and in a way this song is a small tribute to him from a music lover. We have tried recreating the magic of 1970s."Set against the backdrop of the 1975-77 Emergency, "Indu Sarkar" also features Anupam Kher and Neil Nitin Mukesh.The film is slated for a release on July 28.