Yesteryear diva Radha is on Cloud Nine! Why? Her daughter Karthika’s debut Tamil film Ko has been declared a super hit by trade analysts. Meanwhile, Radha and her daughter Karthika recently organized a special screening of Ko for film maker Bharathi Raja (Radha’s mentor) in Chennai. Reportedly after watching the film Bharathi Raja was all praise for Karthika’s performance; he even called the film’s director K.V. Anand and congratulated him.