Alex & Sierra "Toxic" - Audition - The X Factor USA 2013

Alex & Sierra "You're The One That I Want" - Four Chair Challenge - The X Factor USA 2013

Alex & Sierra - Sultry Cover of Britney Spears' "Toxic" - THE X FACTOR USA 2013

Alex & Sierra Knows Grease Is The Word - THE X FACTOR USA 2013

Alex & Sierra -X FACTOR 2013 - ALL IN ONE

Alex & Sierra "Say Something" - Live Week 6 - The X Factor USA 2013

The X Factor USA 2013 - Alex and Sierra's Auditions Toxic

Alex & Sierra perform "Say My Name" - THE X FACTOR USA 2013

Alex & Sierra "Gravity" - Live Week 7: Semifinal - The X Factor USA 2013

Alex & Sierra - Cheating clip

Alex & Sierra - Toxic (Live in NYC Fan Meet | Snippet) [05/06/14]

Alex & Sierra - Toxic clip 1