In September 2009, Katy reportedly flirted up a storm with John at a New York bar. But the next day, she met Brand at the MTV Video Music Awards, leading to a whirlwind wooing and a fizzled 14-month marriage.
Thankfully, Perry appears to be keeping things casual at the moment.
"I don't think either of them are trying for anything serious right now. She's not talking like he's 'The One,'" a source tells People. "She's comfortable around guys who understand the craziness of that world, which he definitely does."
Adds an insider to Us Weekly, "They're just hooking up right now. It's not serious -- yet!"
For the record, Mayer's rep has denied the dating speculation, although if things have turned romantic, the squick-inducing singer has his work cut out for him.
"I'm a woman who likes to be courted -- strongly," Katy tells the September issue of Elle.
Let's hope she's also a woman who has potentially blabby boyfriends sign non-disclosure agreements.