It's Neil Patrick Harris! The most terrifying clown -- next to Carrot Top!
The 34-year-old "How I Met Your Mother" star wore this killer clown ensemble to a Halloween party in Hollywood on Saturday. It's the scariest thing he's been in since "Doogie Howser"!
A Killer Look
10/29/2007 12:04 PM PDT BY TMZ STAFF
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