Hawaii became a state in 1959. There was no ratification involved. In March 1959 Congress passed a law, the President signed it, and then the citizens of Hawaii voted in June of 1959 whether to accept statehood or not.
http://www.law.cornell.edu/uscode/html/uscode48/usc_sup_01_48_10_3notes.html
http://www.law.cornell.edu/uscode/html/uscode48/usc_sup_01_48_10_3notes.html
Thanks Coyotehockey. Almost skipped a beat on that one!