Katy Perry: Why I Don't Pay Attention to Negative Reviews

Katy Perry 'California Dreams' Tour 2011
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LONDON, UNITED KINGDOM - MARCH 17: Katy Perry performs on the opening night of her 'California Dreams' UK tour at Hammersmith Apollo on March 17, 2011 in London, England.

The pop singer also reveals her new TV obsession.

Katy Perry doesn't pay attention to negative reviews.

The pop singer told Rolling Stone that she prefers to measure success based on sales.

"Whenever people ask me about having bad reviews, I'm like, 'Have you seen the run I've had? Have you see the numbers?'" she says. "Numbers do not lie!"

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Perry in fact is the first recording artist to ever have at least one song ranked in the Top 10 of the Billboard Hot 100 for an entire year.

She is currently in the midst of her California Dreams tour with opening act Robyn. Many reviewers haven't been kind.

"Ms. Perry isn't a natural onstage," wrote the New York Times' Jon Pareles. "Her dancing is mostly walking, and her voice is strong but not always well guided."

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Rolling Stone's Meredith Blake weighed in: "For all the precocious sexuality on display, Perry's extravagant show was a celebration of another vice altogether: gluttony."

But Perry is realistic about what she does for a living.

"I'm not a dummy," she told Rolling Stone. "I know 'California Gurls' isn't going to save the world. But I got a lot of heart from my upbringing and I put a lot of heart in my songs."

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Meanwhile, Perry also revealed in the interview that her new obsession is the History series Ancient Aliens.

"Oh my God," she says. "When it talks about the sky people, how everyone comes from the sky and how the Pyramids were used for star observations, it's too much for me. It all seems to connect the dots. It's blowing my mind."