America has not only decided who would hit the stage on performance night but has also picked out the songs for the final top acts held on Wednesday, Dec. 11, 2013. This would definitely make or break their chances on winning at the Fox's reality singing competition.

Exactly who made it to the top final four?

Two of Simon Cowell’s group acts have survived and reached this point of the competition. Real-life lovers, Alex and Sierra and five-group member, Restless Road will take the stage for what could be one of the most important performance of their lives.

Jeff Gutt from Kelly Rowland’s Over 25s group also made it to the semi-final show of the “X Factor USA.” Completing the top 4 finalists is Carlito Olivero from Paulina Rubio’s team.

The finalists will be singing songs picked by the audience for the performance show live Wednesday.

Alex and Sierra’s survival at this point of the competition may not have been a big surprise as the real-life lovers have been a big favorite since day one. Simon Cowell declared during the early stage of the competition that they are the ones “America will fall in love with.”

After their stellar performance of “Say Something” by A Great Big World, Alex and Sierra will sing Of Monster’s and Men’s “Little Talks.”

Simon’s other act who made it to the final 4, the “Restless Road,” will give their own rendition of Luke Bryan's "That's My Kind of Night.”

America has also picked the perfect songs for the last two finalists that will compete in the semi-final, performance show on Dec. 11. Will Carlito Olivero impress the judges and America with Justin Bieber’s “Boyfriend?” Or will Jeff Gutt outshine Matthew Schuler’s outstanding rendition of Jeff Buckley’s “Hallelujah?"

The top final four acts have all great shoes to fill as they hit the show on stage tonight. The semi-performance show for America’s vote could equally give the finalists the amount of pressure that they may never have since the competition kicked off in September 2013.

Tonight, America will decide who has the “X Factor” to come back on the Season 3 Finale on Dec. 18 to 19, 2013. “The X Factor USA airs on Fox Wednesday and Thursdays, 8pm.

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Credit: YouTube/The X Factor USA