It's Katy Perry!
"I ate, I prayed. I climbed a volcano,” tweeted Katy on September 18. She has been keeping her locale under wraps, but People reports that Twitter followers speculate that she’s in Bali after previous tweets have mentioned topics like chakras and meditation. The real question is: if Katy’s on the third leg of an Eat Pray Love trek, where’s John Mayer?