Видео с ютуба Alex Sierra

Alex Serra - Outter Space (Official Videoclip)

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

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

Alex Serra & Totidub - Outer Space/In the Real World

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

Ahora

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

Britney Spears - Toxic (Alex & Sierra cover)

Alexx Cierra (QU3R3T3)

Alex & Sierra - Little Do You Know (Lyrics)

All Alex and Sierra Performaces on T X FACTOR US 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 "Say My Name" - Live Week 6 - The X Factor USA 2013

Alex & Sierra "I Knew You Trouble" - Live Week 5 - The X Factor USA 2013

Alex & Sierra compil Xfactor USA 2013

Alex & Sierra - Scarecrow (Official Video)

Alex & Sierra - Little Do You Know (Lyrics)