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Rachael vs. Guy Kids Cookoff

Food Network

Not only are they talented chefs, Guy Fieri and Rachael Ray are also talented pranksters!

It's the finale of Rachael vs. Guy: Kids Cook-Off on Food Network and the stakes are higher than ever for the young chefs! In the final cook-off challenge, the winner will have their lowest score from their four weeks of competition removed. Talk about a huge advantage!

Of course, it's not going to be easy as the kid cooks must make a family-style dinner for six culinary experts. But there's also a huge and fun twist: In our exclusive sneak peek at the finale, Rachael and Guy set up "the biggest prank in Food Network history"!

"They're going to think it's the finale of an adult celebrity cook-off," Rachael says of the six food industry vets who will be judging the meal. "They'll have no idea a group of kids cooked their food."

And because it's the "biggest prank" in the network's history, Guy warns, "Don't mess this up."

One chef who definitely won't want to mess this finale challenge up? Sydney, because she's "short a score," so that would mean that zero would be eliminated from her final tally. "I'm ecstatic," her mother Hazel says. "I bet she's jumping up and down inside, too."

Rachael vs. Guy: Kids Cook-Off finale airs Sunday at 8 p.m. on Food Network.