Crazy

Half step key change at 1:43.
-Vivas

Why Do You Let Me Stay Here

 Zooey has the cutest key changes.
-Trov

Baby I Love Your Way

I was sitting on this one for a while but Nick tried to submit so I've got to post it.
From the Reality Bites soundtrack (which also brought Lisa Lobe into our lives), this is a cover of a Peter Frampton classic.
Trying not to show my age but I recall there is a Spanish version available on the B-Side of the cassette single.
-Trov

The Imperial March (Darth Vader's Theme)

John Williams could seriously not have done a better job when it comes to his work on the original Star Wars Trilogy.  Best score of all time, super appropriate at every moment.  Listen here to one of his greatest and most well-known works as he takes us up to a new key of evil at 1:42. Best. Key. Change. Ever.
-Nick