First recorded by Dave Dante (1962).
Hit version by Pat Boone (US #6/UK #2 1962).
From the wiki: “‘Speedy Gonzales’, ‘the fastest mouse in all Mexico,’ was written by Buddy Kaye, Ethel Lee, and David Hess (aka David Hill, ‘All Shook Up’) who first recorded the song under the alias ‘Dave Dante’ in 1962. The song was popularized in the United States as a 1962 single by Pat Boone, doing better in many national charts in Europe where Boone’s recording sold a million copies. The female voice (‘La-la-la…’) on this song was of Robin Ward (‘Wonderful Summer’), and Boone’s cover also incorporated Mel Blanc voicing ‘Speedy Gonzales’ as he did in the Warner Brothers cartoons. (Elton John has stated that the ‘hook’ in his best-selling single ‘Crocodile Rock’ was inspired by his listening to Ward’s vocal on ‘Speedy Gonzales’.)”
Pat Boone, “Speedy Gonzales” (1962):