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Jillian Michaels and her partner Heidi Rhoades are spilling some serious secrets about each other in a game of "Who's Most Likely To…"

In the exclusive video above, the stars of E!'s new reality show Just Jillian sit down and reveal major details about each other's personalities.

Who's most likely to fall for a prank? Both Jillian and Heidi say each other.

"I never fall for a prank, I've never fallen for anything," Jillian says.

"I never do either," Heidi tells her.

"Honey you're a total sucker!" Jillian says. LOL!

Jillian Michaels, Instagram

Instagram

Who's most likely to keep up with the Kardashians? Heidi!

"She's friendly with…" Jillian starts to say.

"I'm not friends with her, our kids just go to the same school," Heidi says. "We've done play dates and things but…"

Want to get more scoop on Jillian and Heidi? Take a look at the hilarious video above to see the duo reveal who's most likely to want another kid and to see who's most likely to win an argument!

Plus be sure to watch the series premiere of Just Jillian on Tuesday, Jan. 19 at 10 p.m., only on E!