The X Factor USA 2013 Spoilers: Alex & Sierra Say Something Again (VIDEO)

For The X Factor USA 2013 last night, the final three acts took the stage and performed for our votes in hopes of being named the winner of The X Factor USA Season 3. One of the performances had the acts singing their best/favorite performance of the season and we all knew that Alex & Sierra were going to sing “Say Something” by A Great Big World. If they didn’t, we would all question it, right? Well, they did, so check out their performance below in our The X Factor USA 2013 spoilers video!