Katy Perry burns her blue wig for new single Roar Katy Perry wearing the blue wig for Teenage Dream. KATY Perry has set her Teenage Dream wig on fire in a new promo video for her upcoming single Roar. The 28-year-old sports a gothic look in the 30-second clip in which she sets the wig on fire with a Zippo lighter. She unveiled the first look at the new single via Twitter and added: "WE DON'T NEED NO WATER LET THE BABY BLUE BURN," interpreted as a message she wants to get rid of her soft image with her new album.