Muppet Fact #69
Jim Henson's final taped performance as Ernie was for the song "Don't Throw That Trash on the Ground" written by Donald Alan Siegal. After Henson's passing, Ernie only appeared in non speaking cameos for a time.
Sources:
Sesame Street: A Celebration - 40 Years of Life on the Street. Louise Gikow. 2009
"This Week in Sesame Street: Ernie’s Birthday." Sesameworkshop.org. January 27, 2012.
The Muppets Celebrate Jim Henson. November 21, 1990.
Rock & Roll! Random House. 1990.
Sesame Street. "Big Bird's Birthday or Let Me Eat Cake." March 15, 1991.
Sesame Street: 25 Wonderful Years. October 29, 1993.
Sesame Street. Episode 3136. November 22, 1993.
"Adventure." Christopher Cerf. 1991.
Dancin' Shoes. Charlie Ernst. Kenny Pollock. Mustapha Khan. Kenny Vaughan. 1992.
"Conga." Enrique E. Garcia. 1985.