Happy Birthday, Katy Perry!

Katheryn Elizabeth Hudson turns 38 years old today. Here are five fun facts about the pop singer. 1. She began singing when she was just 9 years old. 2. Perry once kept locks of Taylor Swift and Miley Cyrus' hair in her purse. 3. Her 'Teenage Dream' album had five No. 1 singles, leading her to tie with Michael Jackson's record. 4. Her hit single, “I Kissed a Girl,” was inspired by Scarlett Johansson. 5. Perry's Super Bowl halftime performance is the most watched in history. Happy Birthday, Katy Perry!