Katherine Heigl - Katherine Heigl Poses Nude For 'I Hate Balls' Campaign

Katherine Heigl has stripped down in a bizarre photo-shoot for IHateBalls.com, a new website promoting the practise of snipping animal testicles. The Hollywood star is lending her celebrity status to the campaign, which seeks to fix the "pet overpopulation crisis" by selling t-shirts and underwear.

In a video message for IHateBalls, which has partned with FunnyorDie.com, Katherine reveals her reasons for signing up, saying, "I'm movie star and Maxim 100 member Katherine Heigl. I work with the Jason Debus Heigl foundation and a lot of people come up to me and say, 'Katherine, you promote neutering so much, you must really love animals.' But the real reason I want you to neuter your pets. I hate balls". In a photo shoot for the campaign, the Knocked Up star is photographed topless, holding on to a cuddly puppy. The real reason for her promotion of I Hate Balls has to do with the Jason Debus Heigl Foundation, named after her late brother, which seeks to eliminate the needless suffering inflicted on animals by human cruelty, indifference and ignorance, according to US Weekly magazine.

Fans are being encouraged to donate $5 to the foundation, or to buy some of the underwear modelled by Heigl in the campaign. The Hollywood actress will next star in the 2012 action-comedy 'One for the Money', with Jason O'MARA.