Megadeth took to the Jimmy Kimmel stage last night for his Halloween show to perform a couple songs.  They did so in full costume including Dave Mustaine in a full Frankenstein getup. 

Today is the release of Megadeth's new album Th1rt3en so it was only fitting that they performed last night on Jimmy Kimmel Live.  It was the second song they did.  The other song they did was "Public Enemy #1" off of the new record.   They sound as good as they always do.  You can see their other performance here.