Stop The Planet of The Apes

Hilariously parodied in this classic bit, where Troy McClure (You may remember him from such Simpsons episodes as "Bart's Friend Falls in Love" and "Radioactive Man"!) stars in a musical about Planet of The apes, featuring breakdancing orang-utans and a whole number about Dr. Zaius.

Example of:
All Musicals Are Adaptations