Katy Perry talks of boyfriend John Mayer’s genius brain that should be studied by science

Katy Perry is a believer in the mental capabilities of her singer-songwriter boyfriend John Mayer. The pop princess covers Billboard magazine to promote her upcoming album PRISM looking like a romantic dream fairy, and opens up about her beau Mayer, who can knock out a crossword puzzle like nobody’s business.

“He literally is a genius, as is evident from his songwriting. I always tell him, ‘Darling, you know I’m going to have to give your mind to science after you’ve passed, because we’re going to have to understand how all these sparks work.’ We’ll be in bed,” she says, “and he’ll be doing the crossword puzzle. Every night, he tries to finish it in under 10 minutes. When he puts his mind to something, he really gets it done very well. I always ask for his help.”

In the interview Katy also recalls being thrown some shade by Barbara Walters because she was late to her “Most Fascinating People 2011” interview. “I shouldn’t have done the interview: I was playing Madison Square Garden that same night, and I knew that the end of my marriage was coming,” Perry explains. “I was just exhausted and stressed. I’d prepped everyone that I was running late, but Barbara showed up at the original time anyway.”

When I got there, I apologized immediately, but then she said to me, ‘You know, I’ve only ever waited for one other person this long, and you know who that person was? Judy Garland. You know how she turned out, right?’ I was like, ‘Oh, snap! Yes, bitch!'” she added. “I think it’s the coolest thing that Barbara Walters shaded me. I just couldn’t tell her as we were sitting down for a mega-interview, ‘Hey, my marriage is falling apart. Give me a break.'”

In case you didn’t know, things did not end up well for Judy Garland, who died of a drug overdose at age 47.