"There were two weeks of my life after I found out the truth of my marriage where I was like, 'OK. All right. I can't feel this. This is too intense right now,'" she said, regarding her split from Russell Brand. "I was, like, just eating Flamin' Hot Cheetos and drinking, and that's it."
Of course, Katy was eventually able to find happiness with her current beau, John Mayer.
"He's just a fantastic partner. I've been a fan of his for such a long time," she gushed. "He's got a brilliant, brilliant mind. It's a rad, mature relationship."
Still, Katy knows she's not ready for a family just yet...
"I'm definitely not there yet, and I can't plan that far in advance. When I decide to have a family, I'll just want to be Mom for a little bit," she explained.
For more from Katy, including the truth about her relationship with her parents and info about her upcoming tour, check out the new issue of Marie Claire, on stands December 17.