Rika Ishikawa , is a Japanese actress and model associated with Hello! Project and best known as a former member of the pop group Morning Musume. She was the leader of the Japanese pop idol trio V-u-den until June 2008. She has performed as a solo singer, as a member of the Japanese pop idol group Ongaku Gatas, in the pop duo Hangry & Angry as Angry, and as a member of Dream Morning Musume.

Morning Musume '24 , formerly and commonly known as Morning Musume and colloquially referred to as Momusu , is a Japanese girl group, holding the second highest overall single sales on the Oricon charts as of February 2012, with the Oricon record of most top-ten singles, having 64 of them.