^Actually, from what I've read, Ayu has a lot more creative freedom than you seem to think she does. From how she talked about the I am... covers, it seems like she even had control over what her cover arts where to look like and her costumes. It's also safe to assume that the base ideas for her PVs come from her head and are perfected and built upon by the directors. I also read that the Sweetbox-composition covers came from her listening to a Sweetbox Best album and wanting to do a Sweetbox-like song.
She'd have to have some control if she was able to craft hidden protests(or rather overt ones, like ourselves). If it was avex behind them, that wouldn't happen.
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