not sure if these fall under "worst" or just plain amusing - both pictures freshly snapped and I have no motivation to get a clearer retake of the Arthur Fiedler LP
0) Irwin the Disco Duck in the Navy

seeing those dress blues brings back memories of those pants with upteen buttons in front (that I almost never wore as an engineer fortunately)
1) Saturday Night Fiedler
edit: one of the best covers in my opinion is the 1969 King Crimson LP in my avatar
-removed second edit-