Alex and Sierra - Little Do You Know
Alex and Sierra - Say Something
Alex and Sierra - Heard It Through The Grapevine
Alex and Sierra - Little talks
Alex and Sierra - I Knew You Were Trouble (Studio)
Alex & Sierra - Best Song Ever (The X Factor USA Performance) - Single (1)
Alex & Sierra - Sultry Cover of Britney Spears "Toxic"
Alex & Sierra - Alex & Sierra - Toxic / Thrift Shop
Alex and Sierra - All I Want For Christmas Is You
Alex and Sierra - "Say My Name" (The X Factor USA Performance)
Alex and Sierra - Best song ever
Alex and Sierra - All I Want for Christmas Is You (Studio)
Alex and Sierra - Addicted to Love
Alex and Sierra - I knew you were trouble
Alex and Sierra - Cover of Britney Spears' "Toxic"
Alex and Sierra (ost If I Stay) - Say Something
Alex & Sierra - Bumper Cars (Acoustic)
Alex & Sierra - Say Something [Show Finale Version]
Alex and Sierra - Addicted to Love (Florence and the machine cover)
alex & sierra - little do U know
Alex & Sierra - Say My Name (Destiny's Child Cover)
Alex & Sierra - I Believe In A Thing Called Love (The Darkness Cover)
Alex & Sierra - Say My Name (The X Factor USA Performance)
Alex & Sierra - Little Do You Know (Speed Up)
America's Got Talen: Alex & Sierra - Toxic (cover Britney Spears)
Alex & Sierra - Toxic (Britney Spears cover, live)
Alex & Sierra - Let Her Go (Passenger cover)
Alex & Sierra - If I Didn't Know Better
Alex & Sierra - Come And Get It
Alex & Sierra - Toxic ( The X Factor USA 2013)
Alex & Sierra - Say something (Ellie & Riley. Left Behind)
Alex & Sierra - Toxic (cover B.Spears) LIVE
Alex & Sierra - Give Me Love (cover)
Alex & Sierra - Say My Name (Destiny's Child Cover)
Alex & Sierra - You're The One That I Want
Alex & Sierra - Best Song Ever
ALEX SIERRA - WE WERE YOUNG™ (APRIL 1, 2016)
Alex and Sierra - I Heard It Through the Grapevine (The X Factor Performance)
Alex and Sierra - Addicted to Love (The X Factor USA Performance)
Alex and Sierra - I Knew You Were Trouble jazz
Jeff Gutt feat Alex and Sierra - Love me again
alex and sierra - blurred lines
Alex&Sierra - I Believe In A Thing Called Love (The Darkness Cover)
Alex and Sierra - Best Song Ever (Studio)
Alex & Sierra - Gravity (THE X FACTOR USA 2013)
Alex & Sierra - Say Something (THE X FACTOR USA 2013)
Alex & Sierra - I Heard It Through The Grapevine
Alex and Sierra - Say Something [G7]
Alex and Sierra - Say Something (A Great Big World)
Alex and Sierra - Give me love (Live)
alex and sierra - all i want for christmas is u
Alex & Sierra - Little Do You Know Видео Кларк и Белл
Alex & Sierra - Little Do You Know (zaycev.net) +2
Alex and Sierra - Say Something (live on X-Factor)
Alex & Sierra - Little do you know Разве ты не знаешь?
Alex & Sierra - Little do you know - Little Do You Know
Alex and Sierra - I love you(минус поднятый на 1 тон)
Alex and Sierra - Say somethin'
Alex & Sierra - Say Something (cover A Great Big World)
TVD 7.16 - Alex & Sierra - Little Do You Know
Alex & Sierra - Let Her Go (Passenger cover)
10/Rock Duo/Alex & Sierra - I Love You
Alex & Sierra - Addicted to Love (The X Factor USA Performance)
Alex & Sierra - Come And Get It
Alex & Sierra - Little Do You Know - Arianna Reeves (Recover)
Alex and Sierra - You are the one that I want
Alex & Sierra - If I Didn't Know Better
Alex & Sierra - The A-Team (Live)
Alex & Sierra - I Love You (Harry Styles)
Alex and Sierra - Little do you know (instrumental)