The makers of Colors' weekend show "Naagin", which has Mouni Roy, Arjun Bijlani and Adaa Khan in the lead roles, are leaving no stone unturned to keep its viewers glued to their TV sets.

Recently, Rajat Tokas of "Jodha Akbar" fame was roped in to play an important role in the show. Soon after, there were reports of "Bigg Boss 9" ex-contestant Aman Verma entering "Naagin". The actor, however, denied being approached for the show.

And now, "Bigg Boss 7" contestant Gauahar Khan is set to appear on the show. While the viewers will expect to see the actress play a key role in the supernatural series, according to reports, Gauahar will be on the show to promote "Kyaa Kool Hain Hum 3", in which she has performed an item number.

Besides Gauahar, "Kyaa Kool Hain Hum 3" lead actors Tusshar Kapoor and Aftab Shivdasini will also join the cast of "Naagin" to promote their film. The celebs have already shot for a special episode and will be seen grooving to one of the film's hit songs, "Jawani Le Doobi".

"The B-town faces, Tusshar Kapoor and Aftab Shivdasani have shot an episode yesterday with the Naagin team. And giving them company is the former winner of Bigg Boss 7 - Gauahar Khan, who has performed a dance number in their upcoming flick Kya Kool Hain Hum," a source told India Forums.

Meanwhile, "Naagin" has been ruling the TRP charts since its inception. This week, the weekend show has scored a whopping 5.8 TRPs, beating all other daily soaps.

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