Demi Lovato is a bit of a hair chameleon — she’s had red, blonde, and dark locks over the last year. Now, she’s opting for colors that don’t occur in nature, streaking her ponytail with cotton-candy pink for “The X Factor” auditions in San Francisco. Thanks to the show’s new all-social-media-all-the-time philosophy, there were plenty of tweetable pics of her new look. What do you think? Fun and young? Or behind the trend?