Complex sentence: Ivie Anderson was hired as their featured vocalist in 1931, she is the vocalist on "It Don't Mean a Thing (If It Ain't Got That Swing)" (1932) among other recordings.
Split into simpler sentences: Ivie Anderson was hired as their featured vocalist in 1931. She is the vocalist on "It Don't Mean a Thing (If It Ain't Got That Swing)" (1932) among other recordings.