'X Factor' -- Three Finalists for TWO Hosting Spots

There are 3 candidates still standing for the coveted "X Factor" hosting gig -- Khloe Kardashian, Mario Lopez, and Corbin Bleu -- but only 2 of them will be chosen.

Sources connected to the production tell us the show has decided to go with co-hosts, and Khloe remains Simon Cowell's top pick.

Earlier today, we were told there would only be one host, but it turns out there will be TWO ... and Mario Lopez is indeed the likely choice to share the stage with Khloe. Our bad.

We're told "High School Musical" grad Corbin is waiting in the wings if negotiations fall thru with Mario or Khloe.

As we reported ... E! is worried "X Factor" might take away from Khloe's time on its reality shows.