It's going to be a big week on "X Factor USA." After months of auditions and many rounds of eliminations, thousands of hopeful contestants have finally been whittled down to the season's top 12 finalists -- and this evening, audience members can vote for their favorites. To get pumped up for this week's live shows, "X Factor" put together this super cute, high-energy lip dub to One Direction's hit single "Live While We're Young."

And that's not all: One Direction themselves will be stopping by "X Factor USA" on Thursday to perform "Live While We're Young" and "Little Things" on the live results show. (!)

“It’ll be the first time we’ve performed in front of ‘Uncle Si’ since we were on UK X Factor," said Niall. "So, hopefully we make him proud.”

We live-tweet "X Factor" every week on @HuffPostTeen -- follow along with us Wednesday and Thursday at 8pm EST!

Are you excited for One Direction's "X Factor" performance? Who's your favorite finalist? Tell us in the comments below or tweet @HuffPostTeen!

Also on HuffPost:

Loading Slideshow...
  • Carly Rose Sonenclar

  • Beatrice Miller

  • Arin Ray

  • Diamond White

    13-year-old Diamond White was unfortunately eliminated last week. Check out her performance and let us know in the comments whether (or not) you agree with the decision!

  • Emblem3

    Okay, fine, they aren't part of the teen group... but we apparently have a weakness for boy bands. This is entirely <a href="http://www.huffingtonpost.com/2012/11/02/little-things-lyrics-one-direction_n_2066071.html?utm_hp_ref=teen">One Direction's fault</a>.