From the December, 1978 cover-dated Charlton comics, here's a black and white ad for full color posters (yeah, it doesn't make any sense to me, either) that'll give you a pretty good idea who was considered "Hot" as the 1970s neared the end of that decade that broke up the Beatles and gave us Disco, the Donny and Marie Show, and a lot of comic books that some consider "Bronze Age" and others don't consider to be of an Age at all!
Shaun Cassidy and Parker Stevenson, you may recall, were the stars of ABC's Hardy Boys Mysteries, probably the most successful Hardy Boys adaptation ever (they'd previously been done in live-action form in a serial on the Mickey Mouse Club in the 1950s or early 60s, and then done in animated form in the 1960s by Filmation, including making them into a rock and roll group). Parker Stevenson was married for a while to Kirstie Alley, whose big break was playing Saavik in "Star Trek II: The Wrath of Khan" (and never looked hotter, IMHO)... but I digress.
Cheryl Ladd and Farrah Fawcett were both in Charlie's Angels, although at different times. Farrah was first (and was billed as Farrah Fawcett-Majors, being married to Lee Majors, best known as the Six Million Dollar Man), and when she left the show, Cheryl Ladd replaced her. Cheryl's biggest gig prior to this may have been being one of the singing voices in the Josie and the Pussycats cartoons (she may have been a speaking voice for one of 'em, for all I know).
The bearded chap, "Mr. Adams," was Grizzly Adams, of "The Life and Times of Grizzly Adams," although that wasn't the actor's name... and as I started writing this paragraph, I could recall his name (Dan something, I think... not that it really matters), but can't now.
The Dallas Cowboys Cheerleaders were the tops in their popularity at about this time, as you might have imagined... They (or whoever promoted them) were probably chiefly responsible for the mainstream popularity of cheerleading, especially in professional sports... as a result, all the football teams and basketball teams got their own cheerleading squads upgraded a bit (American Idol judge Paula Abdul got her start, if I recall correctly, as a cheerleader or choreographer for the L.A. Lakers cheerleader squad in the 1980s).
I saved Cheryl Tiegs for last... in my opinion, she was the hottest celebrity babe of the 1970s, bar none. Unlike the top fashion models of these days, she definitely looked healthy and had some nice curves... as well as amazing eyes and a dazzling smile!
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