WILMINGTON: Valerie Bertinelli has piled on the pounds and her nemesis Kirstie Alley couldn’t be happier. ‘Valerie is freaking out after putting on a few pounds, particularly since she and Kirstie have been in a bitter feud,’ said a source. Valerie dropped 49 pounds after replacing Kirstie as the Jenny Craig celebrity spokeswoman in 2007, going from 172lbs to 123lbs . But she’s finding that the older she gets, the harder it is to keep the weight off and insiders say she’s gained about 15 pounds over the past six months.–SS