The Everly Brothers - "Cathy's Clown" (spotlight)

I'm just over a month late, but I wanted to acknowledge the passing of Phil Everly, one-half of The Everly Brothers.  If you're tracing the history of rock and roll, the line between Elvis Presley (the rockabilly sound) and The Beatles (and their early vocal harmonies) passes through The Everly Brothers.  Since their distinctive vocals yielded 26 Top 40 singles in their career, you can't really claim that they were overlooked, but they are certainly overshadowed now by Elvis and The Beatles. 

During their career they made famous songs written by others (e.g., "Wake Up Little Susie") as well as writing songs that others would successfully cover (e.g., "When Will I Be Loved"), but my favorite is probably their 1960 hit "Cathy's Clown", which: they wrote themselves, was never popularized by others, and had a direct influence on The Beatles. 

"Cathy's Clown":  TV July 9th, 1960, UK TV 1961 (backed by The Crickets)
In both videos Phil is on the left; also Don sings the lead and Phil sings on the harmonies / chorus.