Urethra Franklin.
Explanation: This joke plays on the name of the legendary singer Aretha Franklin by replacing “Aretha” with “Urethra” (the tube through which urine exits the body). The humor comes from the unexpected word swap, with “Urethra Franklin” turning into a pun that suggests someone who pees a lot. It’s a cheeky, wordplay-based joke that connects anatomy and music in a humorous way.