History on Instagram: "On May 19, 1962, Marilyn Monroe delivered one of the most iconic live performances in American history during President John F. Kennedy’s 45th birthday celebration at Madison Square Garden. The evening took a dramatic and unforgettable turn when actor Peter Lawford awkwardly introduced her as “the late Marilyn Monroe”—a joke that sparked uneasy laughter as the crowd waited for her delayed arrival. When Monroe finally appeared, she stunned the audience in a skin-tight, shee