On Wednesday's The Ellen DeGeneres Show, the singer says she's in the process of changing her last name to match that of her husband, Russell Brand.
Perry, 26, wed the 35-year-old actor in India in October.
The name change isn't complete yet, but Perry says that she's already being called by her married name.
"Sometimes when people try to get my attention, like if I'm at an event or something like that ... they go, 'Mrs. Brand!'" she tells DeGeneres.
Although Perry calls her new husband a handful, she appreciates his humor most.
"A sense of humor is really important in our household," she says. "That's how we de-stress and we like to have a laugh."