Di Gi Charat: Theater (2000)

Blurb:
What happens when an alien hybrid cat-eared girl with aspirations of becoming the next idol super star lands on earth? Well first of all, she discovers that she needs money. And in order to pay for their high living expenses, Di Gi Charat (a.k.a. Dejiko) and her pal Puchiko have to work. Fortunately for them, an anime retail chain called Gamers has openings! As a new employee, Dejiko becomes quite popular with the customers. But what happens when Rabi-en-Rose, her self-proclaimed rival, seeks to steal the show? And what about Piyoko and the Black Gema Gema Gang, a group of neighboring aliens who seek to kidnap her? These things can only mean one thing for Dejiko: non-stop adventure! Join Dejiko as she spends her summer break tricking Piyoko, blowing up the Black Gema Gema Gang, and switching bodies with Rabi-en-Rose! Also includes extras not available in the original Japanese release: The History of Di Gi Charat, Twenty Questions with Koge-Donbo, Comments from the Artist, Gema Gema 4 panel comics, and Dejiko’s Words of Wisdom (Haiku and short phrases from Japanese fans for the Di Gi Charat 2002 weekly calendar, written in Japanese, Romanji, and English).

Source: www.anisearch.com/manga/4093