Marilyn Monroe - At the John F. Kennedy's birthday party 1962 RARE ! - Duration: 4:26. Marilyn Monroe Official Channel, by Peter Sneyder 219,787 views. Marilyn Monroe canta "Happy Birthday" al Mr President Kennedy. "Happy Birthday, Mr. President" is a song sung by actress and singer Marilyn Monroe on Saturday, May 19, 1962, for President John F. Kennedy at a celebration.