For some reason all large Doll Sites are trying to create new teen celebrities. I'm not sure why this started happenning. I think Stardoll started doing it 3 years ago and after that most of the site in the Dress Up Segment realized that they need to catch on.
The Doll Palace revamped all the offerengs and now has entire section dedicated to celebrity dress up games. DressUpGames.com also added a page where they show case all the celebrities.