Perfect Little That 

a phrase used by Kat Dennings in the movie Nick and Norah's Infinite Playlist (which was based on a book called Nick and Norah's Infinite Playlist but wasn't all that accurate).
Said phrase was used to compare the classic underrated outcast girl to the classic pretty popular bitch and can be used as an alternate name to, really, any perfect and popular girl one comes across.

Norah: Caroline, the problem is that this is not gonna compete with Perfect Little That

Perfect Little That by Jolly Ringwald April 6, 2012