Rajdeep Chatterjee is the 3rd runner up of Indian Idol season 4 . He has sung the title tracks of movies like Bodyguard , Khiladi 786 , Gunday He is a playback singer , a composer and one of the busiest live performing artists . He has released quite a few original contents like Patli Patang , Bismillah , Hindustan ( a tribute to our nation ) , Anjaana along with many popular reprised versions like ‘ Abhi Na Jao Chhod Kar ‘ , Ek pyaar ka Nagma hai , Lag Ja gale , Mora Saiyan , Mai Shayar Toh nahin