Beyoncé Giselle Knowles turns 38 years old this year. Here are five fun facts about Queen Bey. 1. Her favorite number is 4. 2. She was a member of her childhood group, Girl’s Tyme, before becoming a member of Destiny’s Child. 3. Her alter-ego is Sasha Fierce. 4. “Bootylicious” was added to the Oxford English Dictionary after the Destiny’s Child song became a huge hit. 5. She loves Kate Moss’s style. Happy Birthday, Beyoncé!