A page three girl is a female who models for topless or nude photographs that are printed in newspapers (specifically page 3 of the Britishtabloids). Introduced in 1970 by The Sun, the format has been widely copied.
... U.S. Office of the Federal Register (http://www.archives.gov/federal_register/electoral_college/scores.html#1804)
(Larger version)
See also: President of ...