What is a song that wouldn't be known unless you lived around that time?

In all generations there's music that trends, goes around and everyone hears, there's a lot of music thats heard from different generations thats from other generations but what about those songs that never go trending but people grow up listening too but never had the chance to trend, lots of music has been forgotten cause it never went trending but we all have that song we tell ourselves "if this song would've trended it would've been still heard today".
What is a song that wouldn't be known unless you lived around that time?
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