A source told a channel, "Himesh has decided not to do the music for the film as Vivek Oberoi has joined the cast. When Himesh was signed, he was told that it would star Sonu Sood along with Sanjay Dutt."
It was reported that it was Sanjay Dutt who suggested Himesh's name for Sher.
The source further added, "The matter apparently became worse when Vivek Oberoi was quoted saying that Sher is bigger than Tiger (Salman's latest release is Ek Tha Tiger). He wanted to opt out then and there. The makers wanted Himesh to deliver the final song for them but he is not going to do that. He has finally decided to walk out of the film as he did not want to work with Vivek at all."
Well, it seems that Himesh Reshammiya does not want to risk his friendship with Salman Khan at any cost!