India, July 31 -- Singer Sonu Nigam celebrated his 52nd birthday on July 30 amid family and friends. From a one-year-old fan Vedarrth, who was born on July 30 last year, launching Sonu's new single to grandmaster Affan Kutty making a portrait of the singer with 42 Rubik's Cubes in five minutes - it was a room full of music and laughter in Mumbai. Several musicians joined Sonu on the special day, including Anu Malik, Talat Aziz, Agam Kumar Nigam, Harshdeep Kaur, Rabbani Mustafa Khan, Rahul Vaidya, Shreyas Puranik, Daboo Malik, Sudesh Bhosale, Jeet Gannguli and Pawandeep Rajan. Besides launching the single, Sonu also announced a seven-city tour, Satrangi Re, which will celebrate the seven shades of love across seven cities. htc...