Zac Hanson to Welcome Third Child Into Fold Image credit: Jason Merritt/FilmMagic/Getty Images Zac Hanson's new album will be quickly followed by a new addition to his family. The 27-year-old singer said that he and his wife, Kate, were expecting their third child this fall. Hanson is the youngest member of the eponymous band Hanson, which he formed with his brothers Isaac and Taylor. The band is best known for its 1997 hit "MMMbop." Its newest album, "Anthem," will be released on June 18. Hanson told ABC News, "We are so happy and thankful to add more life and love to our family." He said his two other children, 5-year-old Shepherd and 2 ½-year-old Junia Rosa, were just as excited as he and Kate were. "It's fun this time to watch the little ones so excitedly anticipating their new sibling," he said. SHOWS: Good Morning America