The problem is that she's behind the sound of Katy and Britney (FF) so it looks like she's copying them when in reality that's her style.

Her biggest mistake was giving Teenage Dream to Katy, Bonnie herself even seems like she regrets the decision, but she was broke and had to pay the bills. Just like Ester Dean, she probably won't find success as a solo artist because too much of her sound has been popularized by other artists. It's a shame, but sometimes that's the price songwriters pay.