12 letters She said that when it comes to '60s teen idols, all you need to know is one thing: ___ Answer: BOBBYSHERMAN
12 letters Speaker of the Latin quote hidden in the answers to the starred clues ... and the English-language quote hidden in the answers to the double-starred clues Answer: JULIUSCAESAR
12 letters Plot device used in "Freaky Friday" ... or a hint to the interior of 20-, 26- or 42-Across Answer: ROLEREVERSAL