Vocaloid-powered virtual idol Hatsune Miku performed "live" during the Late Show last night, making her US television debut to help promote an art show dedicated to the singer opening in New York. The performance included a band of actual human beings, and seemed to throw Letterman for a bit of a loop.
Here's the performance in its entirety.
It's worth watching the full clip just to watch Letterman attempt to interact with the singer while thanking for the performance. Check out the video below if you'd like to learn more about Hatsune Miku and her popularity overseas.