Alex & Sierra - Little Do You Know (Official Video)

Chord Overstreet - Hold On (Lyric Video)

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

All Alex and Sierra Performaces on T X FACTOR US 2013

Alex & Sierra - Scarecrow (Official Video)

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

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

Alex & Sierra - Little Do You Know #music#sierra #alex #loveyourself #girl #singing #vocals #covers

Luke and Sierra singing Older at Royal Hall Clip

Alex & Sierra - Cheating clip