― Sexy singer, Katy Perry likes to keep things fresh, which is why she’s always seen wearing new hair color at every event. After showing her funky red, blonde and pink hair colors , Katy shocked the audience with her bright blue-teal hair color . 27-year-old star hosted the GiveLove charity event with J. Molinari jewelry designer, Markus Molinari in Las Vegas on January 27, 2012. Newly single Katy Perry chose extraordinary blue color to showed off her sexy bob hairstyle. Katy Perry’s blue bob [...].