Who is the girl who opened a-nation 2007?

[Northerner]

So, I'm watching a-nation 2007 on Veoh right now, and the first act was this girl who dressed in white and did eurobeat-style music. She had two other girls in pink on stage with her. Who was this? Her voice wasn't spectacular, but her songs were very catchy. I especially liked the first one, which had a lot of vocoder and the chorus went something like "Set me free, I wanna feel free!"

She seemed to be performing as people were still getting to their seats, and she didn't have an elaborate stage setup --- I take it she was a newcomer at avex/not that popular yet?

If someone could tell me who she is, I'd appreciate it, since she looks worthy of further investigation.