A perfect pop song should be very simple, genuinely new, catchy, a little subversive, and should perfectly capture its time. It needs to come from nowhere and remain a classic. As such my list would probably be something along the lines of:
Elvis Preseley - Jailhouse Rock
The Beatles - Love Me Do
Pink Floyd - Arnold Layne
David Bowie - Space Oddity
John Lennon - Imagine
Black Sabbath - Paranoid
Gil Scott Heron - The Revolution Will Not Be Televised
Donna Summer - Love To Love You Baby
Kraftwerk - The Model
Sex Pistols - Anarchy In The UK
Gary Newman - Are Friends Electric
Grandmaster Flash - The Message
The Smiths - This Charming Man
The KLF - What Time Is Love
Beyonće - Single Ladies