I think that these 2 videos explain best why Toni wrote the song:

http://www.youtube.com/watch?v=oyGSnePG5Ds

http://www.youtube.com/watch?v=ZZPgVr0iZUY

Also 2 before and after videos from my local tv station :

http://www.wlox.com/Global/category.asp?C=63035