Apparently, the story goes that, the song "Kuch Kum" was originally composed by Vishal-Shekhar for a film which was to be directed by Tarun Mansukhani for the PNC banner. However, the film never took off and Tarun went on to direct Dharma Productions' Dostana.
When Pritish Nandy heard the song featured in Dostana, he was quite livid and raised an objection with the makers - Dharma Productions. However, rather than getting into unnecessary legal tangles, the parties decided to resolve the issue mutually in an out of the court settlement. Eventually, Dharma Productions compensated PNC by paying them Rs.3 crores for just that one song.
While Pritish Nandy must be a relieved man having got his due, the people at Dharma Productions must be surely pondering over this (suddenly turned) expensive song.