Chris Weitz talking about Kristen again to MTV !

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Perhaps the biggest rivalry at the 2010 MTV Movie Awards on Sunday is the head-to-head contest of "Avatar" versus "New Moon." The fierce Na'vi of Pandora and the supernatural creatures of Forks, Washington, are on a collision course in categories such as Best Movie and Best Kiss, but it's the Best Female Performance award that has many fans biting their nails.

While "Twilight" lovers are fiercely loyal to Kristen Stewart, whose portrayal of lovelorn Bella Swan in "New Moon" won her the nod, there's no denying that Zoe Saldana delivered a powerful performance as warrior woman Neytiri in "Avatar." For moviegoers who enjoy both franchises, it's a nearly impossible choice, but for those involved in the franchises, such as "New Moon" director Chris Weitz, the decision is considerably easier.

"Kristen is my girl and I think that she should win," Weitz told MTV News when asked to weigh in. "She's a fantastic actress."

That's not to say that Weitz isn't interested in seeing the "New Moon" star throw down with Saldana for the award, as he suggested: "Maybe they should resolve it with a mixed martial arts thing. Why not?"

Why not? Well, here's one obvious reason: Not only did Saldana get in the thick of battle as the female lead in "Avatar," she also turned in badass performances in 2009's "Star Trek" and this year's "The Losers." On top of that, she's attached to star in "Colombiana," a mercenary thriller from "The Transporter" and "Taken" mastermind Luc Besson. When it comes to kicking butt and taking names — Saldana is certainly not one to be trifled with.

But Weitz wasn't worried. "Kristen's scrappy," the director revealed. "She's wiry, she's scrappy."