Alex and Sierra are officially the new champs of the Top 10 Video Countdown!

The duo's 'Little Do You Know' claimed the No. 1 spot its first week on the countdown! Alex and Sierra are followed by Hilary Duff's 'All About You' (No. 2) and Ed Sheeran's 'Thinking Out Loud' (No. 3).

Taylor Swift's 'Shake It Off' snagged the No. 4 slot, while 5 Seconds of Summer's 'Amnesia' took the No. 5 spot and Christina Perri's 'Burning Gold' took No. 6.

Rounding out the Top 10 are Iggy Azalea's 'Black Widow' (No. 7), OneRepublic's 'I Lived' (No. 8), Sam Smith's 'I'm Not the Only One' (No. 9) and Ariana Grande's 'Break Free' (No. 10).

Vote for your favorites once per hour until the poll closes at 3PM ET on Oct. 23. Don’t forget to tweet with the hashtag #PopCrushTop10 to spread the word about voting for your favorite new video!

If you are on a computer or tablet, the voting poll is the the right of this article. If you are on a phone, you have to scroll down past the Top 10 videos below to access the voting poll.

  • 10

    Ariana Grande, 'Break Free'

  • 9

    Sam Smith, 'I'm Not the Only One'

  • 8

    OneRepublic, 'I Lived'

  • 7

    Iggy Azalea, 'Black Widow' Feat. Rita Ora

  • 6

    Christina Perri, 'Burning Gold'

  • 5

    5 Seconds of Summer, 'Amnesia'

  • 4

    Taylor Swift, 'Shake It Off'

  • 3

    Ed Sheeran, 'Don't'

  • 2

    Hilary Duff, 'All About You'

  • 1

    Alex & Sierra, 'Little Do You Know'