Last night was the finalists' last chance to win your final vote, and we would say Jeff Gutt, Carlito Olivero and Alex and Sierra definitely made it tough to decide.
Each of the final acts got to share the stage with one of their musical idols, and America's favorite couple Alex and Sierra took on the popular ballad "Bleeding Love" with Leona Lewis herself.
"It was really scary!" Sierra told us excitedly. "Just singing with someone that's so successful and singing the song that got her to the top!" Leona won the UK X Factor in 2006 and changed the perception of the show dramatically after selling over 20 million records worldwide proving that stars can and do come from X Factor. "I think that it helps that she's been in our position before on X Factor," Sierra said. And it sounds like Leona was a total team player. "She's the nicest person ever. She was ready to sing the song as many times as we wanted until we got it and she has sung that song a lot of times."
We were kind of shocked that Alex and Sierra wanted to take on the ballad, and Leona had her doubts too. "She told us when we first met her, 'I heard you're doing this song and I'm thinking how are we going to pull this off?'" Alex told us. "The original song isn't something we'd probably choose to do on our own, but she was kind of excited to do a different version so that was very nice for her to say herself, 'I like the way you changed it.'"
There was also a big "aw" moment on stage when Mario gave Alex the chance to say something to somebody. "I wanted to tell [Sierra] honestly how much it meant to me," he said. "This journey was because of her. I don't think that we would be in this position if we weren't in this together. I wanted to make sure she knew how much I appreciated it. We're so grateful."
Each finalist left their hearts on the stage last night, but who will come out on top? Don't forget to catch the finale tonight!
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Gallery | X Factor Top 12 Finalists!