For the Ferris Bueller Ident, I want to use Yello's iconic 'OH Yeah' which is very memorable in the movie
I think that this would generate alot of nostalgia for the movie.
This song is the most iconic from 16 Candles, it plays over the particularly romantic end scene.
For weird Science, the obvious choice is Oingo Boingo -Weird Science, the title of the film is in the name.
This beatles cover of twist and shout would have been a good choice for ferris bueller, it's from the iconic parade scene. However as mentioned in my Practice Blog, it's a little more appropriate for a general summary Ident because it's nice and upbeat.