The grand finale of Chak Dhoom Dhoom has now got its winner. The show saw a tough competition between the four finalists -- Rock On, Harinath Reddy Group, AM Unit and Rohan and Group. A source says, “The decision was very tough and Harinath Reddy was declared the winner. The decision was on the basis of judges’ points and audience votes. We finished shooting the finale on Wednesday. Rock On was the first runners up.” TellyChakkar had also earlier reported that the show was wrapped up much before its actual closing date. The finale will be aired tomorrow.