Article continues below advertisementDance Moms alum Nia Sioux is telling her side of the story in her new memoir, Bottom of the Pyramid: A Memoir of Persevering, Dancing for Myself and Starring in My Own Life.The 24-year-old alleged that the show's star and coach Abby Lee Miller was racist toward her while on the reality TV series. "Being the only Black girl on the team for most of Dance Moms was really challenging," she wrote. Sioux had started dancing on the show at age 9, appearing from 2011 to 2017.