Aki Toyosaki
"Go! Go! Maniac" is a single used as the first opening theme for the second season of the anime K-ON!!. Sung by Aki Toyosaki as Yui Hirasawa, Yōko Hikasa as Mio Akiyama, Satomi Satō as Ritsu Tainaka, Minako Kotobuki as Tsumugi Kotobuki, and Ayana Taketatsu as Azusa Nakano, it was released on April 28, 2010 in Japan by Pony Canyon where it debuted at first in the rankings on the Oricon weekly singles chart, selling approximately 83,000 copies. "Go! Go! Maniac" became the first anime image song to ever top the singles chart and the band also became the first female vocalists to occupy the top two spots with "Listen!!" on the singles chart in 26 years since Seiko Matsuda in 1983. It also topped the Billboard Japan Hot 100.