Mumbai -- Legendry singer Asha Bhosle is the latest addition to the new series of the popular singing show Indian Idol as a judge. According to reports, Asha will be the fourth judge after Anu Malik, Sunidhi Chauhan and Salim Merchant of the reality show which is set to go on air June 1 on Sony channel. The versatile singer has confirmed the news, saying, "The first thing I will ever look for in any contestant is their sur. My focus will be on sur because it is the most important part of singing. I don't like singers, who are not been trained properly". "It is very important for singers to have a classical training as it helps them to sing the right notes. If the foundation of a building is strong, it stands tall forever, similarly, classical training sets the base for good singing," she added. Previously, it was reported that music maestro AR Rahman has been approached for the show but it was not confirmed.