As I was listening to Simon and Garfunkel's great anthem "America" on YouTube, I couldn't help but notice that I had seen one of their photos somewhere before...
...the Monster Manual!
The resemblance is quite spooky, don't you think? Also, it's worth noting that the singing duo looks quite young in the picture, lending credence to the possibility that the artist of the demon prince used S&G as his model for the drawing!
Another thing that Simon and Garfunkel have in common with D&D is "Cecilia", a monster hit for the singers, and "Caecilia", a monstrous, 30-foot long, grey worm from the Basic Edition.
And "Garfunkel" eerily rhymes with Carbuncle.