Sony's Hatsune Miku limited-edition Walkman

TOKYO, Japan - Photo shows Sony Corp.'s Walkman portable music player with popular virtual idol Hatsune Miku etched on the back commemorating her fifth "birthday." Sony said on Aug. 3, 2012, that it will release in mid-August the limited edition. Online orders for 3,939 units of the model have been finished as being fully booked, according to the company the same day.