Kourtney sends congrats to Khloe on Twitter.

Kourtney Kardashian is very proud of her sister Khloe for landing her new gig as the host (with Mario Lopez) of the US X Factor 2012.

The beautiful new Mom used Twitter to send out some love to her sister for landing the job.

She posted a photo of Kourtney doing an X-Factor pose and writes:

"Wooooohoooooo! Pour the champagne! Khloe is the new The X Factor host with Mario Lopez. They will make such a perfect team! I am so proud and honored to call Khloe my sister. And my soul mate…duh. Congratulations Khloe!"

TMZ reveals Khloe has mom Kris Jenner to thank for the deal.

The website reports Kris "single-handedly SEALED THE DEAL to make Khloe Kardashian the new co-host on "X Factor" ... right when negotiations were on the verge of imploding."

Sources spilled to TMZ that "negotiations had come to a grinding halt because E! and FOX couldn't seem to work out a deal that would allow Khloe to appear on both networks," and Mom worked the deal.

The "X Factor" was getting ready to pull the plug on talks with Khloe ... when Kris Jenner got word of the hold up and stepped in.

Sources say Kris "stepped in over the agents ... over everyone" and forced both networks to sit down with her and hash out a deal."

Is Khloe a good choice for the X-Factor 2012?

(Image: WENN)