KK’s career – from jingles to playback singing: KK had a very humble start to his career. He has written and sung numerous jingles before he made his mark in the world of music as a playback singer. KK had also sung for some television shows such as Hip Hip Hurray, Just Mohobbat and Shakalaka Boom Boom. It was AR Rahman who had introduced KK as a playback singer. Later, he marked his Bollywood debut with the much popular song ‘Tadap Tadap’, picturized by Salman Khan, from the movie ‘Hum Dil De Chuke Sanam’. However, one of the most popular songs of KK, to date, remains ‘Yaaron’ from his debut album ‘Pal’ released in the year 1999. The song went on to become the friendship anthem.