Here's a version of the Joker you don't see very often anymore. Jack Nicholson's take on the character has been completely eclipsed by the Heath Ledger version.
And while I'm not that big a fan of Nicholson's go at the role (there was just too much Nicholson in his interpretation) I do kind of like the Tim Burton styled look of his Joker.
This particular bit of cosplay though is a great recreation of the look I think.
Source: Flickr - Chris Alcoran