You may be surprised to learn that the chick anthem 'Girls Just Want to Have Fun' was actually written by a guy. Singer Robert Hazard, who wrote and recorded it as a demo in 1979, meant it as more of a male observation about women -- but Cyndi Lauper saw it in a whole different way.

She tweaked the lyrics to make them more fitting for a female vocalist, and after Hazard approved the changes, Lauper included the song on her 1983 debut album, 'She's So Unusual.' The single -- accompanied by a quirky music video that featured pro wrestling manager "Captain" Lou Albano as well as Lauper's mother, brother and manager -- became a feminist classic of the era, reaching No. 1 in six different countries and No. 2 here in the U.S.

The track, which has since been covered by dozens other artists and featured in numerous TV shows and commercials, remains not only Lauper's signature hit, but one of the most defining songs from the Decade of Excess.

Listen to Cyndi Lauper's Version of 'Girls Just Want to Have Fun'

Listen to Robert Hazard's Version of 'Girls Just Want to Have Fun'