On December 8, 1994, Mariah gave a concert at the Cathedral of Saint John the Divine in Harlem, New York. The concert helped raise $700,000 to support the Fresh Air Fund. Fund officials said that her pledge was the largest the charity had received in at least 30 years, and perhaps in its 117-year history. In return, the name of a camp in Fishkill, NY, previously known as the Career Awareness Camp, was changed to Camp Mariah.
Mariah performed the following Christmas songs: "All I Want For Christmas Is You," "Silent Night," Joy To The World," "Hark! The Herald Angels Sing / Gloria (In Excelsis Deo)" and "Santa Claus Is Comin' To Town," as well as her 1993 single "Hero."
The live version of "Joy To The World" was released, but the whole concert was didn't see the light of day until 2019, when it was included on the Deluxe Anniversary Edition of her 1994 Christmas album, "Merry Christmas." Mariah's performance of "Hero" was released as a bonus track on a special edition "All I Want For Christmas Is You" CD single.