DAYUMMMMM!!! Christina Milian Dresses Up As A SEXY LIBRARIAN . . . And . . . Wait A Sec . . . This Pic Is From YESTERDAY . . . That AIN'T A COSTUME!!!

Cristina Milian was photo'd walking down the street of Beverly Hills looking EXTRA SEXY. Word is that her POCKETS are getting a little light and she's trying to SNAG herself a BALLER.

Keep doing ISH like this . . and you'll be KARDASHIAN'D UP in no time . . .