"iNSaNiTY" is an original song by CircusP featuring SF-A2 miki and KAITO. The original video was uploaded on YouTube on April 11, 2011, a month before Circus-P closed his original account. Later on, it was reuploaded on YouTube by a fan. One upload of the song entitled "iNSaNiTY + English lyrics on screen" has received over 9,000,000 million views, making "iNSaNiTY" the most viewed song featuring SF-A2 miki to date on YouTube. The song was well received, earning a place in the Weekly VOCALOID Ranking #185.[1] It also received various covers (VOCALOID and UTAU) and much fanart as well. Its answer song is MErcy.
On October 4, 2011, CircusP reuploaded the original version of iNSaNiTY (the Frost Mix was never reuploaded) on his new YouTube account, 'VocaCircus."
In December 2014, iNSaNiTY was used as a demonstration song for VY1v4's Power and Soft vocal, as well as showcasing the new growl and pitch snap features for VOCALOID4. V3 Gackpoid took KAITO's singing role to demonstrate the use of the new cross synthesis feature.
This song has entered the Hall of Fame.
