Robert Pattinson's sporting a shorter shag -- and, according to him, a "terrible infestation" is the reason why.
In an interview with Ellen DeGeneres, the "Twilight" star joked head lice were behind the haircut -- before coming clean and admitting his new 'do is for a movie with Reese Witherspoon.
(More photos of Robert Pattinson.)
The flick, "In Water for Elephants," is based on a book of the same name, which revolves around the main character's time in a traveling circus.
