Maddie and Mackenzie Ziegler Dance CHALLENGE

Maddie and Mackenzie take on the latest dance challenges in this head to head battle! Who won this round? ♥ Subscribe to Seventeen! ♥ Check out the #17YOUTUBE ISSUE! ♥ Follow Seventeen ♥ ♥ SEVENTEEN SHOWS ♥ 17 Before 17: Trauma Rama: Beauty Smarties: Seventeen S