[Warning: Potentially Triggering Content] It's been a few years since the world saw the fierce, pint-sized dancers of Dance Moms twirling and fighting their way across Lifetime's small-screen stages in their youthful primes. But now, even more of the show's BTS drama is coming to light. In her new and deeply personal memoir Bottom of the Pyramid, former Dance Moms fan favorite Nia Sioux has come forward with shocking allegations of racism against former dance teacher Abby Lee Miller.