2004- Agatha begins her streak of moderately disturbing costume choices with Slimer from Ghostbusters
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2005- sheet faced
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2006-2008 The Legend
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2009- Agatha S.I.N.ned (though not as much as she did those past three halloweens)
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2010- Sagatha 2: Sag (not) Harder
2011- Professor McGonagall from Harry Potter
2012- The Dowager Countess from Downton Abbey
2013- M from 007: Skyfall