... is what?? Mine is this. Hadn't heard it for yonks, and was too young at the time to even remember it well. Somehow came back to me out of nowhere and no-when and I youtubed it. I have hundreds of favourite songs, and top billing changes from one week to the next, and sometimes within one day. Sometimes it's something current. Sometimes it's something from the sixties. Sometimes it's the Chemical Brothers. Sometimes it's Cole Porter. Last week it was this incredible Japanese song Next week, who knows? What's yours, right now?