Since we've discussed all the those groups that appeared on all them TV shows, I want to give a shout out to John Wayne who managed to land a few young singing types in his movies.....
"The Alamo" -- Frankie Avalon
"North To Alaska" -- Fabian
"Big Jake" -- Bobby Vinton
"Rio Bravo" -- Rick Nelson
"El Dorado" -- Johnny Crawford (He did have 4 Top 40 singles)
& Honorable Mention...
"True Grit" -- Glen Campbell