https://www.yahoo.com/entertainment/...052622853.html
Diana Ross was aware that her fame could allow her to speak to a mainstream audience about Dr. King’s work which was perhaps indifferent or ignorant about his message. On the night of his assassination, The Supremes appeared on The Tonight Show, and Ross directly mentioned the tragedy. Seven months later, in November 1968, Ross again broached the subject while starring on a TV showbiz institution, speaking of Dr King during a monologue at London’s Royal Variety Performance. This was controversial issue in the UK as Queen Elizabeth the Queen Mother, and Princess Anne were in the audience, and the Royal Family is supposedly above potentially contentious political matters.