ladies and gentle man ,today allow me to introduce my favorite pop star Katy Perry to you.She was born on October 25, 1984,is an American singer-songwriter, musician and actress. Born in Santa Barbara, California.Perry grew up listening to only gospel music and sang in her local church as a child. After earning a GED during her freshman year of high school, she began to pursue a music career. She released a self-titled gospel album in 2001 as Katy Hudson which was deemed unsuccessful due to the closing of its record label that year. She later recorded an album with production team The Matrix and completed the majority of a solo album from 2004–2005, neither of which was released.Katy Perry and released her first Internet single, "Ur So Gay",in 2007.She is one of the most popular diva in Europe and American.She has published two albums.The first is "one of the boys" in 2008.She is famous for her first single"I kissed a girl".It's a disputed song,to some extends,it's a song about lesbian.The song has achieve the top 1 of billboard for 6 weeks. And now she has published her second album "Teenage Dream".The first single"California gurls" of this album has get to the top 1 of billboard and continue the top 1 for 6 weeks.The second single"Teenage Dream" always touch the top 1 place of billboard for 2 weeks.