Hatsune Miku is celebrating Sonic’s birthday by wearing a Sonic jumpsuit in Hatsune Miku: Project Diva Ver. 2.5. It’s one of the new modules Sega added to the PSP title. You can also dress Hatsune Miku as Fei Yen, one of the playable virtuaroids in Virtual-On, and as Racing Miku 2011.
The official site has pictures of more modules like append outfits and racing costumes for most of the game’s characters. Hatsune Miku: Project Diva Ver. 2.5 is slated for release this fall in Japan.