Do you remember Aishwarya Rai Bachchan‘s special appearance in Mela at the very end?

The actress very recently revealed why she did this. She told Rajeev Masand:

Aamir (Khan) and I had done a commercial. We did many commercials, later on we did many world tours. I remember after the world tour, we had all become really, really close and he said that “there is this movie, just one shot at the end but it’s not with me, it’s with my brother Faisal (Khan)”. And the rebel that I am, I’m most definitely going to do it.

Well, that’s reason enough.