Spoofed along with "Oliver!" in "Monty Python's the Meaning of Life"
While I instantly recognized the "Oliver!" references in the "Every Sperm is Sacred" production number (the medley is a variation of "Consider Yourself!" and much of the setting is part of "Who Will Buy?"), there is also a bit of the "Thank You Very Much" spoofed there too, right down to the coffin sequence where instead of someone singing to it, the corpse pushes the lid up and sings.
"Great theater makes you smile. Outstanding theater may make you weep."