"The third single I can't reveal yet, because I'm too happy about 'Teenage Dream,' " she told MTV News on the VMA white carpet. "And I love secrets."
But she did leave fans with a hint, describing the video for the next single as "touching."
With an emotional track lined up, Perry also has some plans to tour sometime next year. "I hope that it's going to engage all of your senses: sight, sound, smell, taste, touch," she explained, adding that she had a warning for anyone who has been trying to take a bite out of her scented cotton-candy album cover. "It smells good, but you can't eat the album. I've had people eating the album, and I can't take responsibility for that."
Perry also revealed how excited she's been with the response to the album and its singles. "There's not many more places to go than #1," she said. "There's number zero, but that could be a Catch-22."
Perry seemed most excited for her next big goal, which she intended to address right after the VMAs: "[I need] some sleep, because I'm really sick," she said. "Nursing that cold!"
What single do you want Katy to release next? Share your picks in the comments!
The Moonmen have all been handed out and the stars have gone home, but there's plenty of 2010 MTV Video Music Awards news, interviews, behind-the-scenes scoop, party reports and more still to come, so keep it locked on MTVNews.com.