Sadie & Mark\'s Cha Cha - Dancing with the Stars

Sadie Robertson and Mark Ballas dance the Cha Cha to Katy Perry\'s \"Birthday\" on the first episode of #DWTS Season 19.Subscribe: http://goo.gl/mo7HqTWatch Dancing with the Stars Mondays at 8|7c on ABC!Learn more about Dancing with The Stars:http://facebook.com/DWTShttp://twitter.com/DancingABChttp://instagram.com/DancingABChttp://pinterest.com/DancingABChttp://plus.google.com/ dancingwithth...http://DWTSABC.tumblr.comhttp://abc.com/DWTSOfficial Hashtag #DWTS