Hapi☆Hapi Sunday! (はぴ☆はぴサンデー！) is Kusumi Koharu's 6th and last solo single as Tsukishima Kirari starring Kusumi Koharu (Morning Musume). It was released on February 4, 2009 in both limited and regular editions. The limited edition came with a Kirarin☆Revolution card while the first press of the regular edition came with a Kirarin☆Revolution sticker. The Single V was released on February 11, 2009. "Hapi☆Hapi Sunday!" was used as the last ending theme for the anime Kirarin☆Revolution.