Alex and Sierra have been crowned winners of the third season of the X Factor USA. As a result the couple - who were mentored by Simon Cowell in the competition - also won a $1 million record contract.
Having impressed the judges, including Demi Lovato and Kelly Rowland from the start, Alex and Sierra - who were noted for their chemistry before the live finals round begun - beat fellow finalists Jeff Gutt and Carlito Olivero.
Speaking about his defeat as Alex and Sierra comprehended their victory, Gutt promised to not give up on his dream, saying: "I'm not going to give up. I'm still going to be out there on tour and making records."
Alex and Sierra have been crowned winner of The X Factor USA (WENN)
Meanwhile, Sierra who has shown a lot of emotion on the show, joked: "Thank you so much for getting us here and not making fun of my weird faces all the time, but thank you".
However, it wasn't just Alex and Sierra who were overjoyed with their win as Simon said of the couple: "I feel like Christmas just came early", before going on to tell Gutt:
"Jeff…big respect you did brilliant in the final but my heart was with these guys and I genuinely think they deserve it."
The media mogul, who has teased changes for the new season of the show, appeared more subdued on Twitter, simply tweeting: "Thank. You. America."
Meanwhile, winners Alex and Sierra have yet to take to their Twitter page to tweet about their feelings of being crowned winners of the show.
Last night's X Factor USA grand finale marked the last show as a judge for Demi Lovato who will not be returning for another season.
Confirming her exit to the Hollywood Reporter, Simon said: "I always knew she wasn't coming back because she's touring, so I knew that."
Despite confirming it to the press, Simon also took to Twitter, tweeting almost an hour ago: "To avoid speculation. Because of her tour next year it was unlikely she could do that and X factor."
Demi will not be returning to the X Factor USA (WENN)
Referring to their friendship, Simon continued to tweet on the social networking site:
She and I have had our ups and downs but now consider her a true friend. The door will always be open. And thank you Demi. Simon.x
— Simon Cowell (@SimonCowell) December 19, 2013
As he signed off about Demi, he then shared his thoughts on the next season of the show, teasing fans: "As to what happens in the new year. Stay posted...Whenever a season ends you thank your lucky stars people watched and voted.
"And at the end of the day it's all about the talent.I don't know what is in the water this year but there have been so many incredible songs released this year. From all over world. Next year on our shows the rules change. I had a light bulb moment two weeks ago."
Speaking of her exit, the Mail Online reported Demi telling the press: "I started the show being a singer and a musician, and so I'm going to go back to that.
"It's been really great, but I'm so excited for 2014. I'm going to dedicate it completely and entirely to music – touring and making a new album. Possibly releasing one."