Singer Sonu Nigam , who was away from the limelight for quite some time , was recently seen at the birth anniversary of late legendary music composer RD Burman , who gave us melodious and peppy songs like , ‘Dum Maaro Dum’ , ‘O Haseena Zulfonwaali’ , ‘Chura Liya’ , ‘Ek Ladki Ko Dekha’ , ‘Musafir Hoon Yaaro’ and so on. The event was also saw , singers Shibani Kahsyap , composer Leslie Lewis , who is popular for his work with Hariharan.