“Smash” star Katharine McPhee channeled Anne Hathaway in “The Devil Wears Prada” while dashing to see Anna Wintour yesterday morning. McPhee — wearing flats with her wide leg pants rolled up, carrying her patent leather Christian Louboutin heels in her hand — was spotted asking food cart vendors where Vogue’s 4 Times Square headquarters is. She was directed to the building by a Condé Nast staffer, who coyly asked if McPhee worked there. She replied sweetly, “No, I’m going to meet Miss Anna Wintour.” She was still carrying her heels as a Vogue assistant met her in the lobby, but we presume she swapped footwear before stepping into Wintour’s office.