I can't believe no one guess properly yesterday! I suppose I threw you off with that first picture. That's actually a sewing pattern, I'll be using one of the pieces from it. Though, I have to say "Sexy Abe Lincoln" is a pretty funny thought.
I'll give you more clues:
Yes, I am getting those boots for this costume. The last entry was all about what I'm wearing, this one, not so much.