Kristen Stewart Got Whiplash From Emotional 'New Moon' Scenes

Anyone who's read the second novel in Stephanie Meyer's wildly popular "Twilight" saga knows it is the most emotionally wrought book in the series (thanks, Edward). So it's no surprise "New Moon" leading lady Kristen Stewart got a little worked up filming the sequel, famously telling Entertainment Weekly that she sat in her car sobbing before her breakup scene with Robert Pattinson. When we caught up with Kristen recently at a Beverly Hills press junket, she dished even more about her weighty role, including why it was so much harder than "Twilight."

"The first movie was all about thrusting yourself into something and being impulsive," Kristen explained. "It was all about discovery and first love and abandon. And so that's like a little bit more thoughtless. I went to work. It was a more natural approach.

"'New Moon' was more labor-intensive," she admitted. "Because everything that we established in the first movie, we basically come in and say that [Bella] was just wrong. And so, that's how I start off the movie. As 'New Moon' begins, she knows that she's going to get broken up with, so it's this natural progression of seeing a girl who you saw being so confident in herself to something so daring and new to her."

Combining heart-wrenching scenes with a scattered shooting schedule left Kristen with a case of, well, whiplash. "It was hard to do, because I had to go back and forth from being pulled out of that deep depression," Kristen said. "Within a day, I'd have to go back and forth from doing a scene with and without Jacob. So I would have to be dead, zombie Bella who's just absolutely destroyed, to waking up again."

Click play above to hear more about Kristen (and Bella's) emotional state in "New Moon."

MTV delves deep into the "Twilight" universe with two can't-miss specials: "Love Bites" chronicles the budding rumored romance between Robert Pattinson and Kristen Stewart on Monday at 10 p.m. ET/PT, while "New Moon Revealed" will feature die-hard fans as they gather to meet the saga's stars Monday at 10:30 p.m. ET/PT.