She doesn't actually look up 50s music, she just goes "Fallout Radio OST" for her BGM, because that's Josh Sawyer singing Home On The Wastes, a parody of Home On The Range, he wrote and performed to be included into FNV's soundtrack, but never made it in. There was 10-ish songs Josh recorded for that same purpose, but none of them actually made it into the game.
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