Alex & Sierra was an American duo consisting of Alex Kinsey (born September 8, 1991) and Sierra Deaton (born February 11, 1991), who won the third and final season of The X Factor US. The duo were also dating. They were mentored by Simon Cowell and became the first and only group to win the American version of the show. Their debut album It 's About Us was released on October 7, 2014, on Columbia Records. Their EP As Seen on TV was released on September 30, 2016.
how far did alex and sierra make it on x factor
won the third and final season of The X Factor US