I have always loved Mannheim Steamroller. We have all of their Christmas music on CD and MP3, and listen to it throughout the holiday season.
I can remember the first time I heard this group. It was years ago, and a generic music video was playing on television. The song was Deck The Halls, and I thought, "Who is that?"
I soon found myself in a music store, asking a clerk if they could help me find the name of the group. I was in my twenties at the time, so this was before the days of the Internet (man I'm old). The young woman didn't know who it was, so she said, "Can you hum it for me?"
Within seconds of my humming, she replied, "That's Mannheim Steamroller!" I bought that CD and have been humming their songs ever since.
It's a good thing she didn't ask me to sing it, eh?