Sidhu backed out:

 Sidhu was all set to be a prisoner and had committed to the channel as well as accepted the first installment of his payment, but right on the day the participants enter the House, Sidhu backed out.
The channel wanted a good mix of people in the House and there was buzz about Manoj Prabhakar and Ajay Jadeja participating, but it was finally Sidhu who was zeroed in on. Sidhu was explained the concept of the show and what it would take to participate a month ago. Sidhu was keen to contest and hence, after further discussions, the deal was finalized. Only the contract remained to be signed, as all participants do it just before they actually enter the House.

The channel sent a chartered plane to the Chandigarh airport to fly Sidhu to Mumbai. But Sidhu refused to come to the airport and told the channel that he didn’t want to be a part of Bigg Boss anymore, the source added.

Refusing to comment on the story, the spokesperson of the channel said, “No comments.” 

Well he 'ld have been the most tough contestant to beat amongst all 13 celebs, he defiantly has big fan fallowing then any other of the contestants.