Amitabh Bachchan was spotted at the launch of “Balwinder Singh…Famous Ho Gaya” at the Novotel hotel in Mumbai on Tuesday. The movie marks the acting debut of singers Mika Singh and Shaan. Mika took to Twitter to thank Big B for gracing the event. “The biggest nite of my life d shenhensha himself @SrBachchan graced my films music launch. Thanks for ur blessings b wishes sir !!!” read his tweet. Also spotted at the event were Boney Kapoor, Rajpal Yadav, Vindu Dara Singh, Kavita Kaushik, Sunny Leone and Gabriela Bertante.  Show less