From ESPN:

Yanks drop Smith’s ‘God Bless America’ recording

NEW YORK — The Yankees have suspended the use of Kate Smith’s recording of “God Bless America” during the seventh-inning stretch while they investigate an allegation of racism against the late singer.

The New York Daily News reported Thursday there are conflicting claims about Smith’s 1939 song “That’s Why Darkies Were Born.” The song originated in the 1931 Broadway revue “George White’s Scandals” and was considered satire, but includes racist language. It was recorded by Smith and also by Paul Robeson, who was black. …

Smith died in 1986. The Yankees have used her recording of “God Bless America” and sometimes live singers during the seventh inning since the 9/11 terrorist attacks. They used an organ version of the song on Wednesday and Thursday.