Movies that are perfect and would gain nothing from a remake

Please don't ruin a good thing!
  1. Footloose
  2. Breakfast Club
  3. Ferris Bueller's Day Off
  4. Rocky Horror Picture Show
  5. Mary Poppins
  6. Back to the Future
  7. The Godfather
  8. Singing in the Rain
  9. Sound of Music
  10. MASH (the movie, not the show)
  11. Stripes