HRP-4C - Hatsune Miku from Vocaloid

Even robots can cosplay...

The HRP-4C is a Japanese female humanoid robot, using the voice synthesizer Vocaloid she can sing with Miku's voice. The android has since been improved so that it can produce more natural dance movements, demonstrated at the 2010 Digital Content Expo. Maybe in the future Vocaloid concerts will feature this android.