Katy Perry turned down $20 million payday Tue-28-Aug-12 09:55 Share this By Jay-Jay Feeney"American Idol" offered Katy Perry $20 milliion to be a judge this season but she turned it down. (They are paying Mariah Carey $18 million.)Katy wasn't interested, and "money wasn't the issue." She couldn't fit it into her schedule, and didn't think that it was a good career move right now. You May Also Like Very delicious lyric video for Katy Perry's song 'Birthday' Katy Perry has dyed her hair 'slime green' Was John Mayer cheating on Katy Perry? Become a fan of The Edge on Facebook and on Twitter .