When Bips refused to shake her legs with Vivek, the actor wondered what happened, but didn't bother to investigate deep into it. Source informed NDTV, "Vivek thought, if she doesn't even want to be seen opposite him in an item number, how is she ever going to be able to work with him on an entire film. Hence the producers felt it would be better to let her go."
If we dig deep into Bipasha's such weird attitude towards her co-star, then it is evident that one of their commercial ads that was meant for the International market only developed a strained relation between the duo. The ad featured Bips topless and her then spokesperson clarified that the old commercial was meant for the international market only.
According to sources, since then the couple have been quite uncomfortable with each other. So Bipasha refused to work with Vivek.