Anime featuring a circus I remember an anime about a girl from Japan who came to the United States (where everyone speaks Japanese, apparently) to join a famous high-tech sort of circus. 

What I can't remember is the name of that anime. Could anyone give me a lead?
Based on the limited information provided, my best guess is that you are looking for Kaleido Star:


  Sora Naegino, a young Japanese girl with a great talent for acrobatics, comes to the United States in hopes of auditioning for the Kaleido Stage, a world famous circus which has mesmerized her since childhood.