Twinkle Twinkle Idol Star

Twinkle Twinkle Idol Star (♂ティンクル²♀アイドル☆スター Tinkuru Tinkuru Aidoru Sutā?) is a Japanese shōnen manga by Hikaru Toyama. The manga originally ran in Shōnen Sunday in Japan.

Plot
Marimo Himenogi desperately wants to become an idol singer. When a local contest is announced, she begs her boyfriend, Ayumi to sing as her partner.

Other Sources

 * Twinkle Twinkle Idol Star