Pink thinks John Mayer is a jackass.

There’s at least one woman in Hollywood who isn’t itching to jump aboard John Mayer’s Celebrity Ho-Train.

Outspoken singer Pink has branded the notorious lothario her “The Celebrity She Most Hates” after Mayer made objectifying remarks about the numerous women he has dated at a party in the Hollywood Hills earlier this month.

“I got into an argument with him,” Pink confesses.

“I don’t believe him as much as he believes him. He said something along the lines of, ‘I only shag really stupid women.’”

“And I said, ‘I guess they would have to be.’ I don’t get him at all.”