The actress arrived on the film sets yesterday for her costume fittings and look tests.
Revealed a source close to the development: "If all goes well, they will shoot the number in a week's time on a lavish set with the actors in funky costumes. " Deepika Padukone was previously approached for the song but had to drop out following date issues as Imitiaz Ali's Tamasha opposite Ranbir Kapoor flags off on July 9 in the south of France. Later, there was talk of Heropanti actress Kriti Sanon doing the song. But Nargis seems to have beaten everybody in the race.