User blog comment:Captain Moch/Super Mario 3D World 5th Playable character?/@comment-3396321-20131026232837

Can't go jumpin' to conclusions, Mochy. Rosalina is definitely confirmed, as the Observatory is in the poster thingy. As these stamps are basically little hidden items in the levels, and the Pixie Queen seems to be associated with space, Rosalina may just be getting some more attention. :P

I can see it perfectly in 2, and especially 3, but not 4 at all. The crown in 1 could be Peach or Rosalina.