Katy Perry cries all the time because it's "good" for her.Â The 'Wide Awake' singer regularly has emotional outbursts, but sees them as a good and healthy thing, even though they ruin her stage make-up.Â She joked to German website Blick.ch: "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."Katy - who is said to be single again after her on/off relationship with John Mayer ended again- admits she is a very emotional person, but she wouldn't change her sensitive personality because it has made her stronger and more determined as an artist.Asked whether she cried out of happiness or joy, the 28-year-old star replied: "Both. I'm a very emotional person. Sometimes I'm far more emotional than I'm supposed to be. On the other hand, that's what has made me the artist that I am today."Katy has been open about her heartache in the past, with her concert film 'Katy Perry: Part Of Me 3D' showing her openly sobbing over the breakdown of her short-lived marriage to comedian Russell Brand.