The 28-year-old singer said taking out anger through tears is a good and healthy thing even though it ruins the make-up, reported Independent online.
"I cry all the time - but I had my tear glands removed because it kept ruining my make-up, and applying my make-up takes seven hours. Of course I cry. Crying is good for me," she said.
The 'Wide Awake' hitmaker, who is said to be single again after her on and off relationship with John Mayer, admits that she is a very emotional person.
Perry was earlier married to funnyman Russell Brand.