Freaky Friday, where a woman and her teenage daughter swap bodies, created a lovable and fun story of having the opposite kind of day you expected.
This mega-hit from Paula Abdul was released in 1989 and slowly climbed its way into one of the biggest of the following year, 1990.
Just three days after the first op-ed was published the "Odd Couple" - a show for which the entire conceit is based on the fact that the two main characters are opposite - premiered on ABC following the success of the film version in 1968, which followed the success of the stage play in 1965.
The Op-Ed, which actually stands for opposite of editorial, was first published in the New York Times on September 21, 1970.