Katy Perry is reportedly smoking because of the stress her upcoming wedding to Russell Brand.The 'I Kissed A Girl' singer is rumoured to be engaged to Brand and is said to be considering hypnotherapy to help her quit smoking ahead of the nuptials.According to The Mirror, Perry told a friend: "I'm stressed out with the wedding and I keep smoking to calm my nerves. I do it even though I know it is really bad for me and I know I need to stop."So I'm thinking I am going to have hypnotherapy to help me get over it. I'd never say to kids, 'This is cool'. It's a really bad habit that I need to quit."Rapper Kanye West has reportedly been enlisted to help plan Brand's bachelor party ahead of his wedding to Perry.
