JoJo Siwa Defends Abby Lee Miller's 'Dance Moms' Behavior to Co-Stars

In the first look at 'Dance Moms: The Reunion,' JoJo Siwa defends Abby Lee Miller's past controversial behavior to her co-stars, Chloe Lukasiak, Kalani Hilliker, Brooke Hyland, Paige Hyland, Kendall Vertes and more. 'Dance Moms: The Reunion' premieres May 1 on Lifetime.