Happy Girl

 is the third single by Kitamura Eri under King Records (seventh overall).

CD

 * 1) Happy Girl
 * 2) Kokoro no Rhythm (ココロノリズム)
 * 3) Happy Girl (off vocal ver.)
 * 4) Kokoro no Rhythm (ココロノリズム) (off vocal ver.)

Limited Edition DVD

 * 1) Happy Girl [music clip]
 * 2) TV spot