How Will I Know

Wikipedia says this song was originally intended for Janet Jackson, but she passed on it. The key change is heralded by a saxophone that was not present for the first 3/4 of the song, because obviously. It is sneaky though- sounds like it goes up, but it when the chorus comes around again it’s actually sung lower. Oh man the 80s were great.

-Emily

Precipitevolissimevolmente

Italian key changes for beautiful music lovers.
This song is so groovy.
-Tony Trov

Heaven Is a Place On Earth

Key change is about 40 seconds from the end. This song was nominated for a grammy!
-Emily 

Lui

OF COURSE my favorite band from Italy knows how modulate a key. I love this song so much.
-Tony Trov

I'll Be There For You

Does every Bon Jovi song have a key change?
-Emily

Luigi

I overheard this awesome diddy while I was eating a half pound meatball that did NOT have pork and veal in it.  Louie is the King. Key change at 1:47.

-Nick

Fuck You

The cheekiest song bird Lily Allen tells it like it is.
-Tony Trov