Katy Perry recently posted a tweet saying that in an attempt to change her hair from her signature black color, things took a turn for the worst, and now she has to stay a red head for the next 3 weeks, until it can be fixed. It's comforting to know that even celebrities can have screw ups like this! Here she is promoting her new perfume "Purr"... Her hair doesn't matter, she would be adorable BALD!