Share: Title:Alex & Sierra - Little Do You Know (Audio) Duration: 3:08 Plays: 788K views Published: 9 years ago Download MP3 Download MP4 Simillar Videos ▶️ 3:05 Alex & Sierra - Little Do You Know (video) 788K views • 9 years ago ▶️ 4:45 The X Factor Usa 2013 - Alex And Sierra's Auditions Toxic 788K views • 10 years ago ▶️ 4:03 Alex & Sierra - Bumper Cars (audio) 788K views • 9 years ago ▶️ 4:13 Britney Spears - Toxic (alex & Sierra Cover) 788K views • 7 years ago ▶️ 3:05 Little Do You Know || Alex & Sierra (lyrics) 788K views • 5 years ago