Happy Birthday, br Beyoncé!.br Beyoncé Giselle Knowles turns br 40 years old this year. .br Here are five fun facts br about Queen Bey. .br 1. Her favorite br number is 4.br 2. She was a member of her childhood group, Girls Tyme, before becoming a member of Destiny’s Child.br 3. Her alter-ego br is Sasha Fierce.br 4. “Bootylicious” was added to the br Oxford English Dictionary after the br Destiny’s Child song became a huge hit.br 5. Her fifth studio album, br 'Beyoncé,' was the br fastest-selling album br in iTunes history.