Muse, which is Stephenie Meyer's favorite group, and to which she has given lots of thanks to in her books, are real jokers. 

The group, which is famous around the globe, helped with the Twilight soundtrack by contributing the song Supermassive Black Hole (it's the song played while the Cullen's play baseball). In New Moon they also collaborate with the song I Belong to You. 

Muse has also come out with a new CD and are currently promoting their new single Uprising. An Italian TV show called the group and asked them to perform, but said they had to use playback during the show...which of course, insulted Muse. (playback is when they don't actually sing, but use a recording)

So, in order to get back at the TV show, all the members of the group changed positions. The singer pretended to be the drummer, the bassist the guitarist and so forth. Here's the video of the whole thing so you can see for yourself how Muse 'played'.