Demi Lovato & Sister Madison De La Garza Hit the Dance Floor at Madison's 16th Birthday Party

Demi Lovato broke it down on the dance floor at her sister Madison De La Garza‘s 16th birthday bash!

The “Sorry Not Sorry” singer and the Desperate Housewives actress were all smiles at the party on Monday night (December 18).

PHOTOS: Check out the latest pics of Demi Lovato

On Wednesday, Demi was seen getting some Christmas shopping done at Fred Segal in West Hollywood, Calif.

She sported an a beige cardigan, black skinnies, and black heels. Demi styled her hair in a low bun and completed her look with large hoop earrings.

Watch the sisters show off their moves at the winter wonderland-themed event below!