YouTube views at time of publishing article: 8,211,952. Music Video was originally published on 11 Sep 2013. Watch how it all started! Alex and Sierra’s first audition at the X-Factor USA 2013. They’re doing a cover of Britney Spear’s “TOXIC” in a radically different style. Both of them looking in love, nervous and fresh-faced. Alex is 21 and Sierra is 22.
The original Britney Spears version: