Miley Cyrus changes her look and her style so frequently that we find it difficult to keep up. Whatever she's wearing one week will be gone by the next, and that includes her clothes as well as her hair.
In the precise moment this picture was taken, though, Cyrus had a definite look of Cynthia from the classic children's cartoon 'Rugrats' about her. Did she do it deliberately? Who knows? Cyrus does what she wants, and always looks great doing it!