Nikki Bella and Brie Bella announced that their mother, Kathy Laurinaitis (née Colace), is set to undergo brain surgery on Tuesday, June 30, to have a mass removed.“Our Mama Bella, our Gigi, our Gato is about to head into brain surgery. I ask for so many prayers, so much light and love sent her way,” Nikki, 36, wrote via Instagram.