We all remember Madison as the cute little daughter of Eva Longoria's character on 'Desperate Housewives'.
The two sisters (photographed in 2011) have been very close since Madison was just a little girl.
Demi and her younger sister now look just like twins!
The singer was on hand to celebrate her sister's sweet xixteen. Demi wore a black and white pinstripe blazer, which revealed her sexy bralette.
The former 'Desperate Housewives' starlet was all smiles during her party.
Demi Lovato's younger sister is all grown and looks just like her famous siter.
Here's little Madison with her bff Jayde when they were in fourth grade.
Happy birthday, Madison!