Katy Perry’s career has certainly paid off! The pop icon, 39, rose to fame in 2008 when her single, “I Kissed a Girl,” hit the radio and quickly shot to number one. In the years since, Perry has continued to make more successful music and take on even more lucrative new ventures. According to Celebrity Net Worth, the “Teenage Dream” singer is currently valued at $400 million for her catchy tunes, television work and brand deals. In 2010, Perry reached a new level of fame with her track “California Girls,” the first single from her upcoming third studio album, Teenage Dream. The body of work re…