I started writing about Sia as an introduction to this post and something about what I was saying suddenly seemed familiar, so I checked and I have already said everything about Sia last year that I was going to say all over again this year. So take all of that as read, and instead take particular pleasure in this video, which features Kristen Bell as our festive hostess, as well as a panoply of cameos from other recognisable faces. This was a 2017 release and a number one hit in the US and Canada, and it is very dancealongable, so make sure to play it at your Christmas party.