Beyoncé's daughter Blue Ivy is growing up fast – literally! The eight-year-old's grandmother Tina Knowles recently paid tribute to her grandchildren on Instagram, and revealed that the little girl is constantly shooting up – so much so that she's nearly taller than her grandmother. Tina posted a picture of herself with her daughter, Blue and three-year-old Rumi, which was taken on the set of Beyoncé's new visual album, Black is King.