\\<br>Mack Z is a singer/dancer/reality TV star best known from the hit Lifetime show Dance Moms which also features her mother and Sister Maddie. This is her .<br>Mackenzie performs her hit Holiday Tune Christmas All Year Long on Good Day New York Christmas Eve morning 2014!! Get her Holiday Single on iTunes .<br>Check here every Wednesday for new vids and all sorts of exciting new stuff. XOXO Mack Z Dont forget to subscribe.<br>SUBSCRIBE! Hi BBoys & BGirls! Thanks for watching the final episode in #MattyBSummer2014! This week, after getting caught in a .
