Katy Perry has revealed that her Grammy-nominated hit "I Kissed A Girl" was written about a teen friend she was once obsessed with."People always ask me whether I've really kissed a girl. The song was inspired by a friendship I had with a girl when I was 15, but I didn't kiss her,"
says Katy, 24."I was totally obsessed with her. She was beautiful " porcelain skin, perfect lips " and I still