Well, it turns out #9 is real:
Check out this link!!
So, here's an extra one that I hope is imaginary!:
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Basso Profundo Fest 1969 (Found in a dollar bin for $0.25)
The Basso Profundo Fest is an annual contest and festival, like a Barbershop Quartet competition, but for basse vocalists and their groups. In 1969, the fest's management wanted to turn away from "Asleep in the Deep" and "Ol' Man River" traditional favorites for decades and become more "relevant." So this year, the Bass quartets performed covers of popular tunes like "Aquarius", "Sounds of Silence", "MacArthur's Park", and on a lighter note, The Chipmunks' "Christmas Don't Be Late."