Aki Toyosaki
"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.