In June 1981, I thought Stars On 45's "Medley" was one of the coolest songs I'd ever heard. I was pleased when it topped the charts that month.
It still impresses me. A producer has to have a good ear to segue the guitar intro of Shocking Blue's "Venus" with "Sugar, Sugar" by The Archies and follow it up with a string of Beatles snippets. Rhythmically, it all makes sense, and the soundalike singers mimic Beatles vocals convincingly.
Obviously, it made a strong impression, as I'm still playing that 45 40 years later.