September 23, 2011 Mason graduate and group perform in NBC?s ?Sing-Off? Edit Delete Tags Autopost MASON - Danielle Withers of Mason used to sing in the halls for her family. Monday she sang on TV for the nation.Source: http://www.daytondailynews.com/news/dayton-news/mason-graduate-and-group-perform-in-nbcs-sing-off-1255751.html?cxtype=rss_local-newsshack tv net