James Corden just finished a strong week of shows broadcast from his former home town of London, where one of his show’s regular features, put on prime display, was his practice of bringing out each night’s celebrity guests at the same time, seated on the same couch and forced to both interact and listen. Tonight, you can watch the long-running U.K. talk show from which Corden cribbed the idea: The Graham Norton Show. Corden was a guest on that show in 2014, sitting on the same couch as Katy Perry and Sir Paul McCartney, and clearly relished and remembered the special chemistry he and McCartney quickly developed. (Years later, Corden would drive McCartney around Penny Lane for last year’s Late Late Show with James Corden programs from England.) But Corden owes Norton for this concept – and here’s the latest example of the original article, with guests including Sir Ian McKellen (who was a guest on Corden’s show this week as well) and Madonna – whose chemistry, or lack of it, with McKellen is in itself quite entertaining.