Abbott and Costello Go To Mars (1953)
Having run out of exotic backgrounds on Earth, the duo board a spaceship and think they've landed on Mars when they're in the middle of the New Orleans Mardi Gras.
Hijacked by a couple of bank robbers, they escape to Venus (not Mars!), which is populated solely by former Miss Universe contestants under Mari Blanchard as Queen Allura.
No matter how far they travelled, the stars' comic inventiveness was at a standstill and this film's tired and mechanical routines haven't improved with age.