初音ミク
Hatsune Miku remained the most popular vocal for the software. Upon release she overloaded the yamaha server as users made activation requests. As well as this, a backlog of 10,000 copies of her software was reported at one stage as supplies failed to meet the demand. The Hatsune Miku v3 product was credited for an increase of Vocaloid related sales by 19.7% in 2014.