The politics of forming India's next government could come down to how many seats a 1960s matinee siren can wrest from a rival named Stalin in Tamil Nadu.br br At stake are 39 parliamentary seats in Tamil Nadu, a state known for its ancient Hindu temples, its modern auto industry - and a history of electoral landslides.br br With pollsters predicting that no party will win a majority in the 543-seat parliament, the caucus returned by India's sixth-largest state could hold the key to forming a government after the five-week general election that starts on April 7.br br Tamil Nadu Chief Minister Jayalalithaa Jayaram - or 'Jaya' to her fans - is riding a wave of popularity that could take her AIADMK party's seat count to 27, according to one survey, potentially casting her in a new role as national powerbroker.