One of the Boys is the second studio album by American recording artist Katy Perry. Her change in record label, and adoption of a pseudonymous surname accompanies a notable shift from the Christian rock of her self-titled debut album. The album was released on June 17, 2008 by Capitol Music Group. The album features the Billboard Hot 100 number-one single âI Kissed a Girlâ, as well as top three hit âHot n Coldâ, top ten hit âWaking Up in Vegasâ, and top thirty hit âThinking of Youâ. The album earned Katy Perry two Grammy Award nominations in 2009 and 2010. One of the Boys has sold more than 5 million copies worldwide.