From the USPS press release November 15, 2024:

In recent years, the Black Heritage series has celebrated a man one year and a woman the next. Next year, the 48th stamp in the series will honor Allen Toussaint (1938–2015), the virtuoso pianist, singer, songwriter, composer, arranger and producer responsible for scores of hits across multiple genres. Designed by Ethel Kessler, an art director for USPS, the stamp features a photograph taken by Bill Tompkins in New York City in 2007.