There're several different acts currently charting as The Sundowners:
1.) The Sundowners were a country-western trio from Chicago, 1959-1989. They included guitarist Don Walls, guitarist Bob Boyd and bassist Curt Delaney. Promoting their retrospective CD, Bloodshot Revival proclaimed The Sundowners knew more than 15,000 songs, playing about 7,000 songs annually.
2.) A very early collaboration between Will Oldham and Bill Callahan.
3.) A 1960s Sunshine Pop group, notable today for having their song "Always You" compiled. Read more on Last.fm