If she does top both MDNA Tour and Sticky & Sweet Tour, congrats to her, Madonna will just have to go all out again.
There was once upon a time when a highest grossing tour for a female was under $200 million and now that doesn't even get you a seat in the Top 10.
The thing I don't get is that even The Mrs. Carter Show World Tour had potential after she released BEYONCE and didn't even capitalize on it, she only did the additional European leg, so I dunno what her plan was since that was probably one of her peak times as an artist with the hype on the album, a tour and Drunk In Love going around so virally with 'surfboard', and the Grammy's and VMA's performance.