Monthly Moron for September 2013

Which one of these Blonde former child stars had the most spectacular fall from grace?
 
0% Miley Cyrus
Miley Cyrus
© 
By Glenn Francis Uploaded by MyCanon (Britney Spears) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 4.0-3.0-2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/4.0-3.0-2.5-2.0-1.0)], via Wikimedia Commons
20% Britney Spears
Britney Spears
© 
By The Heart Truth (Amanda Bynes on the Red Carpet) [Public domain], via Wikimedia Commons
80% Amanda Bynes
Amanda Bynes