This is a list of albums from the Japanese anime K-On!. Theme songs "Cagayake! Girls" "Cagayake! Girls" is a single used as the opening theme for the first season of the anime K-ON!. Sung by Aki Toyosaki as Yui Hirasawa on vocals with Yōko Hikasa as Mio Akiyama, Satomi Satō as Ritsu Tainaka, and Minako Kotobuki as Tsumugi Kotobuki as backup, it was released on April 22, 2009 in Japan by Pony Canyon where it debuted at fourth in the rankings on the Oricon weekly singles chart, selling approximately 62,000 copies. "Cagayake! Girls" – 4:13 "Happy!? Sorry!!" – 3:45 "Cagayake! Girls" (instrumental) – 4:13 "Happy!? Sorry!!" (instrumental) – 3:45 "Don't say "lazy"" "Don't say "lazy"" is a single used as the ending theme for the first season of the anime K-ON!. Sung by Yōko Hikasa as Mio Akiyama on vocals with Aki Toyosaki as Yui Hirasawa, Satomi Satō as Ritsu Tainaka, and Minako Kotobuki as Tsumugi Kotobuki as backup, it was released on April 22, 2009 in Japan by Pony Canyon where it debuted at second in the rankings on the Oricon weekly singles chart, selling 67,000 copies. It was also awarded the Best Theme Song at the 2009 (14th) Animation Kobe Awards. "Don't say 'lazy'" – 4:27 "Sweet Bitter Beauty Song" – 4:21 "Don't say 'lazy'" (instrumental) – 4:27 "Sweet Bitter Beauty Song" (instrumental) – 4:21 "Go! Go! Maniac" "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. "Go! Go! Maniac" – 4:11 "Genius...!?" – 4:29 "Go! Go! Maniac" (instrumental) – 4:10 "Genius...!?" (instrumental) – 4:26 "Listen!!" "Listen!!" is a single used as the first ending theme for the second season of the anime K-ON!!. Sung by Aki