If it was Pamela Anderson who raised the mercury levels in reality show "Bigg Boss 4", this season Indo-Canadian porn star Sunny Leone is set to add fuel to the controversial show by making an entry Saturday.

"Sunny is coming down especially for the show and will enter (Bigg Boss's house) on November 20," a source from the channel Colors confirmed to us.

The 30-year-old, whose real name is Karen Malhotra, will land in Mumbai Thursday night.

Born to a Punjabi family in Ontario, Leone has appeared in various reality shows in the US, and was named among the world's top 12 porn stars by fashion magazine Maxim in 2010.

Leone was also approached by acclaimed Bollywood director Mohit Suri for his film "Kalyug", a film about the growing pornography industry. However, the role was ultimately essayed by model Deepal Shaw.

For the ongoing, fifth season of "Bigg Boss", there was buzz that international pop star Shakira or boxer Mike Tyson might join the show. But with news of Leone's entry, the speculations seem to have been put to rest.

Whether the adult star will be a long-term participant or a guest is still not sure.

"We can't confirm whether she will stay for long or just for two-three days. All we can say is she is coming to participate in 'Bigg Boss'," the source added.

When Pamela came to the show last year, it made for a jaw dropping moment for many. But it will be interesting to see how the mixed gag bag of the aggressive and argumentative celebs like Akashdeep Saigal, Amar Upadhyay, Siddharth Bharadwaj, Pooja Missra, Shraddha Sharma and Mahek Chahal in "Bigg Boss" will react to a porn star's entry in the show.