She performed in the Las Vegas production for nearly two years until it closed in August 2012 .
In December 2010 , Smithson began singing with Cirque du Soleil in Viva Elvis .
Smithson performed in the Las Vegas production for nearly two years until it closed in August 2012 .
In December 2010 , Smithson began singing with Cirque du Soleil in Viva Elvis .