"Forty-Five" is a song by the American rock band The Black Keys, featured on their album titled "Delta Kream," released in 2021. The track showcases the band's signature blues-rock sound, characterized by gritty guitar riffs and soulful vocals. It pays homage to the music that influenced them, particularly the Mississippi Hill Country blues genre. The song's title refers to the .45 RPM records, which were popular in the mid-20th century. "Forty-Five" captures the essence of nostalgia and the raw energy of classic rock, reflecting the band's roots and their appreciation for traditional music styles.