Was Aamir's Delhi Belly song shot a while ago?

Aamir Khan shot for his Delhi Belly item number a while back -- when the film had begun shooting almost two years ago. An actress was inititially approached to do the song but had refused leaving Mr Perfectionist to get jiggy himself. The makers are, however, claiming that the song was recently shot with Aamir's moustache which he has grown for Reema Kagti film being digitally removed! Mooch ado about nothing!