You do know that by "peers", she was referring to Rihanna, Lady Gaga and Beyoncé right? Now I'll put it out there. Aside from the odd few songs of hers, I've never really liked Perry's music. I've never considered her to be that great of a singer and she's certainly not a brilliant overall performer. Last I checked, the cost of tickets all depends on the production value, high standard show and the star power of that artist performing. So if you're a mediocre performer or if your sets aren't elaborate enough and the production isn't huge, you don't really have the right to be charging fans their left leg to attend your shows. It's not as cut as dry as charging cheaper to be reasonable. You charge proportionally to the quality of your shows and it's good she understands that.