A "happy birthday" tweet from Donald Trump to God Bless The USA singer Lee Greenwood went off course after the president mentioned the wrong Twitter user.
Mr Trump tweeted: "Happy birthday to the great @leegreenwood83. You and your beautiful song have made such a difference. MAKE AMERICA GREAT AGAIN!"
The singer's Twitter name is @TheLeeGreenwood , but the president directed his message to a Lee Greenwood who describes himself as a New York lawyer with Washington DC roots.
That Lee Greenwood commented on the mistake, writing: "I get this a fair amount, but certainly not at this level."
Mr Trump later corrected his tweet.
Happy birthday to the great @TheLeeGreenwood. You and your beautiful song have made such a difference. MAKE AMERICA GREAT AGAIN!— Donald J. Trump (@realDonaldTrump) October 27, 2017