Dave Grohl shocked his fans with a surprise announcement on Tuesday, revealing that he fathered a child outside of his 21-year marriage to Jordyn Blum. The frontman of Foo Fighters, 55, is seeking "forgiveness" from his family after the birth of his youngest daughter. "I've recently become the father of a new baby daughter, born outside of my marriage," Grohl wrote in a statement shared on social media Tuesday. He is already a father to Violet, 18; Harper, 15; and Ophelia, 10.