I agree with velobabe. She looks more Chihuahua/Yorkie than Maltese/Yorkie. Both Yorkies and Maltese have quite a bit of coat at twelve weeks.
It's impossible to tell with mixed breeds how they will look as adults, though. Maybe she's got red legged Yorkie in her genes?
You might want to read this thread. She looks a lot like Ksena:
http://www.yorkietalk.com/forums/gen...-chuahuas.html