Who sang poncho and lefty besides Emmy Lou Willie Nelson Merle Haggard and Steve Earle?

"Pancho and Lefty" has also been covered by artists such as the country band The Highwaymen, which included Johnny Cash, and by the singer-songwriter Townes Van Zandt, who originally wrote the song. Additionally, artists like Lyle Lovett and the band The Amazing Rhythm Aces have put their own spin on this classic tune.