You may not hear sisters Lennon and Maisy‘s music in heavy rotation on country radio yet, but Billboard has already included them on their list billed as “21 Under 21 2016: Music’s Hottest Young Stars.” They are among the youngest, for sure, because little sister Maisy Stella is only 12 and Lennon is only 17…. <a href="http://www.cmt.com/news/1771973/lennon-and-maisy-make-billboards-under-21-list/" title="Read Lennon and Maisy Make Billboard‘s “Under 21” List”>Read more »