She never had anything posted to her refrigerator, you're being unfair.
If I may confess, Melanie was among the first then "modern" pop music I heard around the time I was 12 (and before I moved on to rock). I had liked the Beatles as a younger child, but my interest in music waned between, say, 8 and 12. My parents for some reason (probably because of "What Have They Done To My Song, Ma?" which was a big hit in Germany) had a Melanie pre-recorded tape and I started listening to that on rotation. It also helped my English at the time, because I found the lyrics very audible on her recordings.
Even back then I had a hunch (untarnished by true knowledge, much less actual experience!) that "the pair of roller-skates" and "the brand new key" were metaphorical!