I contacted ticketmaster to see if I could upgrade my tickets for the July 18th show (I'm in Section 101). I saw on the Interactive Seat Map that there were a few seats still available closer to the stage (but in different rows) and they told me no. It's final sale
Oh well, I'm still happy I get to see her.
It says on their website that you can upgrade your ticket as long as it's equal or greater value.