Demi Lovato is a Purple Princess

Demi Lovato takes pictures and signs autographs for her fans outside her uptown New York City hotel on Thursday.

The Disney sensation, who celebrates her Sweet Sixteen on Wenesday, has been promoting her debut album, Don’t Forget, out in stores next month (September 23).

And Demi isn’t the only one in the family climbing the fame ladder. Her 6-year-old half-sister landed a role on the hit ABC drama Desperate Housewives. According to TV Guide, Madison Delagarza will play Gabrielle Solis’ (Eva Longoria) older (but troublesome) daughter, Juanita.

10+ pictures of Demi Lovato, the purple princess…