I was sure there's been thread on this recently but either I made it up or I can't find it.
I thought of one from when I was a young 'un.
When I was about 6 years old I had Michael Jackson's Bad album on cassette that I used to listen to on my walkman.
One day my mam had to ask which song I was singing along to as she'd never heard the lyrics 'Do you want a piece of gateaux?' before.
It was Dirty Diana.