Over the weekend, spies said, Paris Hilton was on her way to a photo shoot and "wanted a puppy in the picture with her so it would look cuter." Hilton waltzed in [to The Puppy Store in Los Angeles] and tried to buy a Yorkie but was rebuffed by an employee who said it was clearly "an impulse buy." Hilton, who has a menagerie of neglected animals, went "ballistic," we're told. "She started screaming, 'I love my puppies! I want my baby!'" - but to no avail.