Here i am proposing a method that might resist to this regionalism..
considering the show is "Indian Idol" not "Andhra or Rajastan Idol" .. we had to normalize the votes coming from different states.
I am proposing a variable and a constant. variable is the player quotient and constant is state quotent.
player quotient = (no of votes to a particular player)/(total no of votes from a particular state)
state quotient = (population of a particular state)/(population of country)
the result will be caluclated by multiplying the "state quotient" with "player quotient" for all the states and add them.
The player who got the highest score is the winner.
Dont scold me if this wont work ..