Katy launches 'Purr' perfume

U.S. singer Katy Perry smiles during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London, November 12, 2010.  (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry smiles during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London, November 12, 2010.  (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London, November 12, 2010. (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London, November 12, 2010. (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London November 12, 2010.  (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses with her fragrance 'Purr' at Selfridges department store on Oxford Street in London November 12, 2010.  (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses with fans during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London November 12, 2010.  (REUTERS/Stefan Wermuth)

U.S. singer Katy Perry poses during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London November 12, 2010. (REUTERS/Stefan Wermuth)