Farah khan's Om Shanti Om has a special song in which all the big names of bollywood are going to make special appearance, from Amitabh bachchan to Salman khan almost everyone had done shooting.

But, when Farah khan approached Aamir khan to make a special appearance, she was in for a rude shock.Aamir khan immediately refused citing that he is too busy

It seems that Aamir khan has a sharp memory, When SRK was offered to do a cameo in Rakesh mehra's Rang de basanti he refused to be the second fiddle to Aamir khan
and now Aamir khan has returned the compliment

This has once again proved that there is no love lost between the two khans, and its obvious that we won't be seeing them in any future movie which is a shame as lot of fans would like to see them together in a movie