I don’t care how famous a person you are, getting a letter from Paul McCartney is a majorly huge deal, something Carrie Underwood will agree with.

Sir Paul wrote a very special letter to Carrie Underwood giving her permission to perform the Beatle’s song Yesterday at the Emmy Awards last night.

Carrie performed Yesterday as part of a tribute to the historic events of 1963, which included the Beatles' TV debut in America.

Carrie wasn’t lost on the significance of receiving a letter from Paul McCartney and says she’ll treasure it forever.