Pop singer Katy Perry has denied "bumping uglies" with Good Charlotte guitarist Benji Madden. The pair were apparently spotted "getting cosy" on Saturday night (Valentine's Day) in Las Vegas.However, Perry wrote on her blog: "It's two pseudo famous people sitting next to each other. [It] doesn't mean we were bumping uglies! You know I don't just do that with anyone!"The I Kissed A Girl star has apparently sworn off men after splitting up with Gym Class Heroes singer Travis McCoy and now only has time for her cats. "I was there celebrating a really fun show and a boozy Valentine's Day with all my good friends," she continued. "We were like a group of 25! Benji is a nice young fellow, but my heart really belongs to kitty purry/markus molinari."