A source tells us that there was an unexpected visitor on the sets of Humshakals. The film directed by Sajid Khan stars Saif Ali Khan, Riteish Deshmukh, Ram Kapoor, Bipasha Basu, Esha Gupta and Tamannaah. So, who visited the sets, you ask? The Humshakals team was surprised when Aamir Khan walked onto the sets of their film.