Mackenzie Ziegler Pens Sweet Birthday Note For Big Sis Maddie!

Maddie Ziegler just celebrated her 15th birthday and her little sister Mackenzie made sure to celebrate with a special post!

The social media star took to her Instagram to not only write a super sweet note, but also share some hilarious videos of the sisters spending time together.

“happy bday bestfriend <3 i can't even believe you are already 15!! even tho we fight sometimes you are the most down to earth person i know. here are some videos that make me laugh lol. love u lots," Mackenzie wrote, adding lots of hearts.

Check out all the videos she shared below…