It can't get any cuter than this! Majokko Rikachan no Magical Biyuuden is a Japanese TV show that ran for 60 episodes in late 2004. It featured the members of v-u-den along with other Hello! Project members. The series seems to be the opposite of a reality TV show:
J-Pop singers v-u-den are Ishikawa Rika (石川梨華, leader), Miyoshi Erika (三好絵梨香), and Okada Yui (岡田唯):
And here's a bunny themed music video that they just did: