The Four Chair Challenge concluded on The X Factor  when Simon Cowell selected the top 4 out of his final 10 group acts on Thursday.

Cowell had to face the tough decision of selecting his final four out of his top 10 groups acts he chose last week.

After each act finished their performance, they learned if they were "safe" or were eliminated. Even when told they were safe the first time, they still faced the possibility of being eliminated if another group outperformed them afterward.

Sister Act Roxxy Montana impressed all four judges—Cowell, Demi Lovato, Kelly Roland and Paulina Rubio—with their rendition of Michael Jackson's Man In The Mirror so they were deemed safe. Real-life couple Alex and Sierra performed a cutesy version of Youre The One That I Want from 70s movie Grease soundtrack. When the couple kissed after their performance the crowd went wild.

Here is the list of the top 16 acts that will compete next week during the live shows.

Cowell's final four GROUPS:

Restless Road
Sweet Suspense
Alex & Sierra
Roxxy Montana

Paulina Rubio final four BOYS acts:

Carlos Guevara
Carlito Olivero
Tim Olstad
Josh Levi

Demi Lovat final four GIRLS acts:
Khaya Cohen
Danielle Geimer
Rion Paige
Ellona Santiago

Kelly Rowland's final four OVER 25 acts:
Jeff Gutt
Rachel Potter
James Kenney
Lillie McCloud

'The X Factor' USA 2013 Season 3: Simon Cowell's Groups Vy For Top 4 Spots In Final Four Chair Challenge; Top 16 To Be Revealed (VIDEO)

The X Factor season 3 live shows will return on Monday, Oct. 14 at 8 p.m. EST on FOX