Shake it, girls!
Maddie Ziegler and her sister Mackenzie Ziegler are showing off their dance skills on Instagram — all to benefit a girl named Olivia from The Children's Wish Foundation.
"We would love for you to make our friend Olivia's dreams come true," says Maddie in the clip.
"Her dream is to become famous!" adds Kenzie.
So how do they plan to make this dream a reality? By making an adorable dance go viral! Check it out below: