Share: Title:Britney Spears - Toxic (Alex & Sierra cover) Duration: 4:13 Plays: 6.2M views Published: 7 years ago Download MP3 Download MP4 Simillar Videos ▶️ 3:05 Alex & Sierra - Little Do You Know (video) 6.2M views • 9 years ago ▶️ 4:45 The X Factor Usa 2013 - Alex And Sierra's Auditions Toxic 6.2M views • 10 years ago ▶️ 3:05 Little Do You Know || Alex & Sierra (lyrics) 6.2M views • 5 years ago ▶️ 42:13 Alex & Sierra -x Factor 2013 - All In One 6.2M views • 8 years ago ▶️ 3:28 Alex & Sierra - Scarecrow (video) 6.2M views • 10 years ago