Sabrina Carpenter is working late ‘cause she’s got a new partnership with Dunkin’. The pop singer, best known for her chart-topping track “Espresso,” has launched her very own beverage, fittingly called Sabrina’s Brown Sugar Shakin’ Espresso. Carpenter’s handcrafted iced beverage combines “Dunkin’s bold espresso, brown sugar notes, and oatmilk, shaken to perfection,” per the company. “The result is a deliciously …