It's March 9th, in other words, happy Miku Day! (3/9 in Japanese can be pronounced as mi-ku, the same sound as Hatsune Miku.)
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(Miku Design from まさに・・・まさに・・・女神サマ!!
Romaji: Masa ni... Masa ni... Megami-sama!!
English: Most Certainly... Undoubtedly... A Goddess!!, by Utata-P/illust. wogura)