Khloe Kardashian and "Extra" host Mario Lopez may seem like an unlikely pair, but the new co-hosts of "The X Factor" are already showing that their chemistry is going to make for one fun show!

"Extra" correspondent (and Simon Cowell ex) Terri Seymour caught up with the duo at their first official photo shoot, where the two shared inside jokes -- Mario even calls her #nastygirl on Twitter -- and laughed about Khloe's intruding mom-ager, Kris Jenner.

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"To every rehearsal, she wants to come. I'm like 'Dude you're embarrassing me!'" Khloe vented.

Mario chimed in "I like her mom!" then Khloe continued, "She used that! She's like 'But Mario likes me!' I go 'I don't care who're my mom still, it's embarrassing!'"

Watch the interview above to see what hosting advice the pair got from Simon, plus Khloe addresses her mom's Wonder Woman nip slip controversy!

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