San Diego Arts. Archived from the unique on January 1, 2021. Retrieved February 15, 2010. Though most of her lyrics are sung in a simple pop contralto, she judiciously adds vibrato, sudden jumps into her head voice, and quick reiterations of the same pitch (what academics in the classical new music field phone a "Monteverdi vibrato"). Archived (PDF) from the original on sixteen March 2019. Retrieved 19 August 2012 - through The Anarchist Library.