I was going to leave the tired old wardrobe discussion alone, mainly because I see virtually no connection between what someone wears and their talent as a singer/songwriter/overall musician.  A look may catch an eye, but if there is no talent to back it up, boredom will set in pretty quickly.  
But I'm back .. because of this . . .
 
Grace has talked about the changes in many interviews and made it very clear what she wants and likes .. so, by blaming the label, the implied message is that Grace is lying - repeatedly .. and that just doesn't set very well with me.

Keep in mind that this is the same label that let her shelve a solo project with T-Bone Burnett (that had to have been pricey!) and then agreed to halt the album recording that was well underway so Grace could go off by herself for a few weeks.  They certainly sound like brutal dictators to me. 

On another note .. it's 2012, what Janis Joplin, Patti Smith, Aretha Franklin, Bonnie Raitt did/didn't wear when they were Grace's age is fairly irrelevant - not to even mention the difference in styles and personalities.  Although it's not hard to find old photos of Aretha Franklin in some rather sexy/borderline outrageous outfits. 

A more apples to apples comparison of style and personality would be Tina Turner.  Pretty sure no one thinks she got by on her legs alone. 
[/rant]