The old poster, which the musician Quim Barreiros apparently used for his album promotions, shows a man posing nude holding an accordion to hide his modesty, bearing resemblance to the 'PK' teaser where Aamir is seen naked with a tape-recorder.
The film's poster evoked all kind of reaction including a case against the 49-year-old star for propagating obscenity.
But this is not the first time that the poster of an Aamir Khan's film has been called a copycat.
His last superhit action venture Dhoom 3's poster was said to be inspired from Christopher Nolan's 'The Dark Knight'.
The popular first look of 'Dhoom 3', which saw Aamir looking out of a large window, seemed similar to Nolan's movie, where Christian Bale's Batman was seen striking the same pose.
The poster of movies like 'Ra.One', 'Ram Leela' and 'Anjaana Anjaani' were noted for their resemblance to Hollywood posters.