John Cena and Nikki Bella

World Wrestling Entertainment (WWE) star John Cena's fiancee and fellow wrestler Nikki Bella says her niece Birdie will be the flower girl at her wedding next year. Bella said that Birdie, 2, whose parents are Nikki's twin sister Brie and her husband Daniel Bryan, will play a major role in the ceremony. "Yes, John has three nieces, so we're going to have them as flower girls and then my brother's little girl Vivienne and Birdie as well. We'll probably get Birdie a really special dress," Nikki told E! New recently.