For the album Century Child (2002), she experimented with a more "rock" sounding voice, where she maintained the classical singing technique, but, for example, sang with less vibrato.
Na albume Century Child (2002) Tarja experimentovala s viac rockovo znejúcim hlasom, pričom si stále udržiavala svoju klasickú techniku spevu, ale napríklad spievala menej vibrato.