In the late 70's, Dr. Pepper was big. Big as in, on the level of rivals Coca-Cola and Pepsi, thanks to a marketing campaign that made a star out of actor-singer David Naughton, who parlayed the ad campaign into the short-lived ABC series Makin' It and the horror movie, "An American Werewolf in London".
Dr. Pepper also contracted with Hanna-Barbera to have a couple of familiar cartoon icons appear with Naughton. First up, Popeye (Jack Mercer):
And, then, Fred Flintstone (Henry Corden), with a side order of Jimmie Walker (Good Times):
While Dr. Pepper is still around, none of their ad campaigns in recent years have matched the pop culture power of "Be a Pepper".