"Accentuate the Positive" at a family reunion when I was five. I think I learned it from the Andrews Sisters' version, but not sure. Several entertainers recorded it about the same time. When I was about 11, someone at a family reunion brought up my earlier performance and the fact that I had all the words and their pronunciations down pat. When told of this, I could remember the first two and fourth lines of the first verse and nothing else. Given the number of verses, I doubt I knew it all at the age of five, so I suspect family member who lauded my feat six years later was suffering a memory lapse, too.