Kristen Stewart admits it's "scary" picking out a red carpet dress. "I can't pretend I don't think about it," the star, 19, told "Extra's" Mario Lopez at Monday night's "New Moon" premiere in Los Angeles. Added Stewart, who wore Oscar de la Renta, "It's always last minute!"

See photos of what the stars wore to the premiere!

How did Robert Pattinson feel about the thousands of fans who had camped out to see the stars?

"I'm kind of a little bit overwhelmed," the star, 23, admitted to Lopez.

See what else Pattinson, Stewart, Taylor Lautner and Dakota Fanning had to say on the carpet in the videos below -- and tune in to "Extra" tonight for complete coverage!