Simon will join gospel singer BeBe Winans at the legendary Apollo Theater in Harlem for two nights -- Dec. 16 and 17 -- for a Christmas concert called "Miracle on 125th Street."
The program will include solo performances by both singers as well as some duets. The announcement said the concert will also feature a performance by singer Rob Thomas of Matchbox 20.
A portion of the proceeds from ticket sales will be donated to the Apollo Theater Foundation.
Simon is currently working on an album of new music, scheduled for release in 2005. She has also composed songs for the upcoming Disney animated feature "Pooh's Heffalump Movie."