Demi Lovato is a redhead now! The 19-year-old singer debuted her new hairstyle via Twitter yesterday. And she's not the only one to go ginger this year: Michelle Monaghan, Malin Akerman, and Whitney Port all tried shades of fiery red in 2011. Tell us: Do you like Demi's new look? For more amazing hair makeovers, click through the gallery.