Jimmy Fallon recently told Faul McCartney that he does the best Paul McCartney impersonation. Why yes. Isn't that why he got the part? You have to read between the lines sometimes. They are just putting it out there that Faul is a double.
Author of The Splitting Image: Exposing the Secret World of Doubles, Decoys, and Impostor-Replacements Add Tina Foster as a friend on Facebook