Fred Astaire refused to sing the Irving Berlin song "The Yam" because he thought it was silly, so Ginger Rogers got a rare chance to sing it alone. Later, Astaire joined in the dance after Rogers was finished singing.
In her 1991 autobiography, "Ginger: My Story", Ginger Rogers related that the entire film originally was planned for Technicolor. However, other sources, including Arlene Croce's "The Fred Astaire & Ginger Rogers Book," a lauded study published in 1972, maintained that just one Irving Berlin song, "I Used to Be Color Blind," would have burst into Technicolor during the dance. Croce explained that color tests were shot, but their quality was poor, so the scheme was dropped.