Ernest Kador Jr. (February 22, 1933 – July 5, 2001), known by the stage name Ernie K-Doe, was an American R&B singer best known for his 1961 hit single “Mother-in-Law“, which went to number 1 on the Billboard pop chart in the U.S.

Born in New Orleans, K-Doe recorded as a member of the group the Blue Diamonds in 1954 before making his first solo recordings the following year. “Mother-in-Law“, written by Allen Toussaint, was his first hit, reaching number 1 on both the Billboard pop chart and the Billboard R&B chart. In the UK, the song peaked at number 29. K-Doe never had another top-40 pop hit, but “Te-Ta-Te-Ta-Ta” (number 21, 1961) and “Later for Tomorrow” (number 37, 1967) both reached the R&B top 40.