From 1981 until 1985 he was a member of the popular Bulgarian rock band Impuls, where he first got experience in writing and arranging songs.
Kolarov has also conducted various performances for the Varna National Opera, such as Giacomo Puccini's Gianni Schicchi, Manuel De Falla's El Amor brujo and The Wizard of Oz.
The rock opera also featured Glenn Hughes, Joe Lynn Turner and band members of Europe, among others.
The album also features songs previously written for the musical Hey Poltergeist, say, such as Beyond boundary, I am guilty, Smile!
Kolarov spends most of his time in his own studio in Varna, while also performing live at the piano bar Royal Classic together with Asen Georgiev and other Bulgarian artists as special guests.