If You Leave

I think there are 7 key changes in this one. 
 -trov

What The World Needs Now

I'm happy this is the first key change of the year.
-tony trov

Silhouettes

From the 60s on 6.
-Joanna

For Your Precious Love

Whole step up key change at 1:38.  Otis is the absolute king.  I love Marvin Gaye, David Ruffin, John and Paul, the Beach Boys, Al Green, Sam Cooke, Freddie Mercury, and Wilson Pickett as much as anyone on Earth but Otis Redding's voice is the greatest thing ever.  You can hear him crying.
-Nick

Beating Hearts Baby

Key change is in the outro hook.
-Frank

Honeycomb

This key change is sweet as honey.
-Joanna

Love On Top

Key change on top.
-Dave Kiss