Kid’s Tv Show “Mystery” Song?

[Misty13]

I keep singing this song and I’m pretty confident it came from a kid’s TV show, I just can’t remember which one. The show would have been running roughly around 2005 - 2012ish. I remember a few lyrics, though I’m unsure how accurate they are; “it’s a mysteryyy, how did it happen? what could it be?” or something like that. Maybe even, “it’s a mysteryyy, what’s happening? happening to me?” Does anyone know where this is from? It’s driving me crazy!!

[Ringlet]

Toyah Wilcox sang a song called "It's a Mystery, oh it's a mysteryyyy"
She sang it with a pronounced lisp.

[Spicerack]

Is it British or American?
Cartoon or whatever not a cartoon is?
Comedy or (mystery)drama?
Muffin the Mule would be more ABer era
but you never know your luck.

[Misty13]

I'm not sure of the origin of the show, but it was shown in Australia. Last night I realised it may even be a movie? My memory of it is so clear, even my family members recognize it but no one can work out what it is.

[chessington]

1996 on IMDB Its a Mystery, a kids programme with Neil Buchanan?

[Misty13]

I don't recall any visual information about it either, so I am unsure if it was live action or cartoon. No idea what it was about.

[Spicerack]

Doesn't seem to have lyrics, chessington.
But it looks like a good show.