Watch Maddie and Kalani's duet, "Two Sapphires," from Season 4, Episode 7, "Big Trouble in the Big Apple". #DanceMoms #AbbyLeeMiller #MaddieZiegler Subscribe for more from Dance Moms and other great Lifetime shows: http://po.st/SubscribeToLifetime Enjoy more Dance Moms on YouTube: http://po.st/WatchDanceMoms Find out more about the show and stream full episodes on our site: http://po.st/Social_YouTube_DanceMoms Check out exclusive Lifetime content: Website - http://po.st/Lifetime_Site Facebook - http://po.st/LifetimeFacebook Twitter - http://po.st/LifetimeTwitter "Dance Moms" follows Abby Lee Miller and the nation's favorite tween dancers as they take on Hollywood while new auditions, new competitions, and new studios raise the stakes. Lifetime® is a premier female-focused entertainment destination dedicated to providing viewers with a diverse selection of critically acclaimed and award-winning original movies, scripted dramas, and unscripted programming. A favorite and trusted network for women, we are continually building on our heritage by attracting top Hollywood talent and producing shows that are modern, sexy, exciting, daring, and provocative. Visit us at http://www.myLifetime.com for more info.