Well I doubt she'd be getting the same amount for EVERY show. It would obviously vary with the venue and how much tickets she's sold etc. It's not far-fetched to believe that for some shows she would have gotten 1.5 mill though.
I wanna see Brit's tour merchandise from the Circus Tour. Surely she would be about 200 million + She's always been one of the leaders in Tour Merchandise sales...she once held the record until Madonna took it away with the Sticky & Sweet Tour.