Dance Moms fans saw Abby Lee Miller's erratic teaching style on eight seasons of the reality series from 2011 to 2019 - but Nia Sioux's new memoir takes readers behind the curtain on some of the infamous dance teacher's most extreme behavior. "Being the only Black girl on the team for most of Dance Moms was really challenging," Sioux, 24, who joined the show at just 9 years old, wrote in Bottom of the Pyramid: A Memoir of Persevering, Dancing for Myself and Starring in My Own Life, published on Tuesday, November 4. "My mom and I dealt with microaggressions and racism daily.