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If you can hum a few bars from the theme song for “The Flintstones,” “The Jetsons” or one of the more than 250 other cartoons made by Hanna-Barbera since the late 1950s, you have Hoyt Curtin to thank.

Starting in the 90s, Cartoon Network Groovies fused new and old cartoons with music. Songs included "Josie and the Pussycats in Musical Evolution" and "Go Monkey! Go!" Years later, artists spoke with ...