What was the title character of a 90th birthday special participated in by Thelma Mae Harper made honorary mayor of?
Betty White Betty Marion White Ludden (known professionally as Betty White; born January 17, 1922) is an American actress and comedian, with the longest television career of a female entertainer. Regarded as a pioneer of television, she was one of the first women to have control both in front of and behind the camera; and is recognized as the first woman to produce a sitcom, which contributed to her receiving the honorary title "Mayor of Hollywood" in 1955.
Joan Merrill Joan Merrill (January 2, 1918, Baltimore, Maryland–May 10, 1992 New York, New York) was an American singer and actress. She began her career in the 1930s on radio and later sang at nightclubs across the United States, including at the Copacabana in New York City, the Thunderbird in Las Vegas, Nevada, and the Rio Cabana in Chicago. In addition to live performances she starred in the 1941 musical film "Time Out for Rhythm" and, in 1942, had roles in "Iceland" and "The Mayor of 44th Street". As was popular at the time, her songs were patriotic and inspired by support for World War II.