Saturday evening means it's VocaJazz time!
Now, if you were to look for examples of Miku singing jazz, most of what you'd find really doesn't work with her normal voice.
Here, though, with what I assume has been very careful 'tuning' of the voice-bank source for this, it does work and very well too! I was very pleasantly surprised at just how well her Catnap works in this style and with her voice thus finely-adjusted, using the controls available to users of the Vocaloids' composition software.
There's even a bonus afterward, with about half of a similarly jazzy version of Electric Angel, so do keep playing the clip right to the end...