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Megadeth got in the holiday spirit on Jimmy Kimmel’s show Monday, as the band performed a couple of songs in full Halloween costume.

Frankenstein, the Wolfman, the Phantom Of The Opera and Dracula all rocked out the new single, “Public Enemy No. 1,” from the new “TH1RT3EN” release, available today.

The guys also closed the show with their classic, “Symphony Of Destruction.”

Why “Thirteen”? The album's title has several layers of meaning, which leader Dave Mustaine, who first picked up an axe at the age of 13, revealed in a recent chat with RollingStone.com, saying, "I was born on September 13th; this is my thirteenth record. It just seemed like it was the right thing to do to call it ‘TH1RT3EN.’"

The album marks the recorded return of bassist Dave Ellefson, who was part of the band's classic lineup from 1983 to 2002. Dave returned to performing live with the band in early 2010, and the new project marks the first time Ellefson has played on a Megadeth record since 2002's “Rude Awakening.”