Katy Perry began vocal lessons at age 9 and started singing in church. At age 13, she got a guitar as her birthday present and started playing songs she wrote. She also took dancing lessons and learned how to swing, Lindy Hop, and jitterbug. In 2001, she released her debut album Katy Hudson, which contained contemporary Christian music, but it was commercially unsuccessful. Her second album, on the other hand, One of the Boys (2008), contained the singles I Kissed a Girl and Hot n Cold, which topped the charts and brought Katy Perry international fame.