Rookie? Hardly. Folks: It appears we’ve got a secret second-timer on our hands.

Nearly a decade before she crashed the shores of "Real World: Cancun," Jonna Mannion was a contestant on NBC's Saturday morning reality TV competition for kids, "Endurance." And after weeks of putting together supersize puzzle pieces, making sure balloons didn’t pop and sporting the perfect adolescent balance of rolled-up head bandana and drugstore brand sunglasses, the plucky then-13-year-old came out on top, winning a grand prize trip to the Amazon. (Check out the final episode below.)

Moreover, she and her partner completely dominated the competition, stomping on 12 other competitors and coasting to the end without facing a single elimination round (which, by the way, was 'Rock, Paper, Scissors'... every time).

So, after an inaugural "Rivals" win with partner Jasmine, we're wondering –- are Jonna's winning ways a sign of things to come? Or will her hotheaded second half ruin her chances of lightning striking twice? Tell us what you think in the poll!

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