Contestants choosing the elimination ??

We have been seeing contestans choosing the eliminations.. contestants vote for the worst co-contestant in the show & the person who gets more no of votes will get eliminated from the show in V Channel and M TV. I guess similar kind of activity is followed in Amul's Ungalil yaar adutha Prabhudeva even.. promotional videos show that contestants are asked whom they dislike most and looks like Sai Pallavi is been voted most. I think everyone is interested to know whats gonna happen in it..