Abby Lee Miller has plenty of thoughts on her dramatic exit from Lifetime's Dance Moms. Miller quit the show with an angry Instagram post on Monday. She had an exclusive sit-down with ET on Wednesday. In the interview She talked about her reasons for leaving the popular reality series, as well as the show's new choreographer -- Dancing With the Stars' Cheryl Burke. "I think that's great," Miller told ET's Nischelle Turner about Burke joining the show.