Thought I recognised a phrase from Rise in this 2014 interview (quoting Katy):
'I just try to be aware, very conscious of the temperature of if I’m too much in there. I don’t always tweet. Sometimes I’ll tweet for a couple weeks a lot and then you’ll find me offline for a week or whatever. I guess I just know how to not overdo it. But just enough. Every once in a while I feel the vultures circling, ready to take me down, and then I’m, like, 'I’m backing out, I’m backing out. I’m going away. I’m going to let you take a breather.'
And she recently said it was brewing for a long while.