"What's Happened to Blue Eyes" is a song by American country music artist Jessi Colter.
[1] Since its release, the song has been covered by Jennings as duet with Colter for their 1981 collaboration, Leather and Lace.
"What's Happened to Blue Eyes" was released as Colter's second single on Capitol Records and was issued August 4, 1975.
[2] The song was the follow-up single to Colter's major country pop crossover hit, "I'm Not Lisa", which was released earlier in the year.
[3] Billboard magazine reviewed the song favorably, saying that "when she writes, she turns out masterpieces, and then when she does the interpretation herself, it is superb.