Blake Lively is obsessed with cooking. Sources say she spent hours with hubby Ryan Reynolds at the St. Charles showroom in the Architects & Designers Building meticulously picking out every detail of the uber-expensive French La Cornue stove for their upstate country house. A witness told us, “Blake said she and her brothers will be fighting over who gets to use the stove,” which can cost upward of $25,000. Our spy added, “She was lovely and hugged everyone in the showroom.”