But since you want to talk about Tour, California Dreams tour started in February when she only had 3 hit singles at the time. Tickets went on sales late 2010 when Firework was just starting to climb the charts, so technically she didn't have 'all her hit singles' like you were claiming. Her tour sold out 98%, but since it was her first big WW tour, they decided to keep ticket prices affordable to everyone, resulted in the average gross. I'm sure her next tour will gross much more now that she's a global superstar and can charge higher tickers
Now you can continue to to be an uneducated hater clinging to her to tour gross, or you can just accept that Katy is doing better than GaGa at the moment despite Applause is being much more talked about than Roar (on ATRL)