The duo have created many chart buster songs together in films like "Yeh Jawaani Hai Deewani", "Bajrangi Bhaijaan" and "Cocktail". Their latest soundtrack is for Shah Rukh Khan-Kajol starrer "Dilwale".
"It is very challenging to work with Pritam. Right from the day he cracks the song, till the day the song goes out, he is constantly working, re-working, doing changes in the song. It has happened that a song is about to be shot tomorrow and Pritam is doing last minute changes to it overnight," Amitabh told PTI.
The lyricist believes Pritam has a wide range.
"Pritam has a range in his work. He has catalogues of hits and blockbusters. He has a 'Barfi!' and a 'Yeh Jawaani Hai Deewani' too. His spectrum as an artist is vast. It is always good to work with composers who have range," he said.
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Bhattacharya, however, feels sad that his "Bombay Velvet" soundtrack, composed by Amit Trivedi, could not get its due credit.
"We worked hard for two years for the film. More than me, I think it was Amit who was ten times more attached to the project than I was. When a film fails it is sad, but this is part of the game," he said.
Amitabh Bhattacharya will be teaming up again with Pritam for Ranbir Kapoor-Katrina Kaif starrer "Jagga Jasoos", Karan Johar's "Aey Dil Hai Mushkil" and Aamir Khan's "Dangal".