Among the cast who attended were Chloe Lukasiak, Brooke and Paige Hyland, Kendall Vertes ... said, before quipping with a laugh, “Anyways, I’m not that upset.” Related: Dance Moms' Chloé ...

That's why the Dance Moms alum didn't join former costars JoJo Siwa, Brooke Hyland, Paige Hyland, Kalani Hilliker, Kendall Vertes and Chloé Lukasiak in the new Lifetime documentary special.