The influence of the '70s on Atlanta crooner Patrick "Sleepy" Brown is manifested in almost everything he does -- from the soulful and funk-driven textures overlaying his urban hip-hop sound to his taste in sunglasses and pants. In appearance he might resemble Isaac Hayes, but his smooth falsettos seem closer to that of Curtis Mayfield's voice. To incognizant hip-hop listeners, Sleepy Brown is simply the singer associated with OutKast, emerging in the 2000s on tracks like Big Boi's "The Way You Move" and his own Top 40 single, "I Can't Wait." Nevertheless, he has been active since the early '90s as a member of the renowned Atlanta-based production group Organized Noize.