In the first 30 seasons of "The Simpsons", there is not a single season with more female guest stars playing themselves than male ones. Well, there was one draw as no guest stars appeared in the first season...
A butterfly bar chart with two sets of mirrored bars for each season of "The Simpsons" showing the number of female (left, yellow) and male (right, light-blue) guest star appearances in the first 30 seasons.