"Undead" is a song by American rap rock band Hollywood Undead, the first track and second single from their debut full-length album, Swan Songs.

The song peaked at #10 on the Hot Mainstream Rock Tracks, #12 on the Hot Modern Rock Tracks, and #4 on the Bubbling Under Hot 100. "Undead" was released as a 7" single in the United Kingdom on HMV with "Circles" as a second track.

During Super Bowl XLIII, a trailer aired for G.I. Joe: The Rise of Cobra which featured "Undead". The song is also featured in the video game UFC 2009 Undisputed from THQ and is part of the soundtrack for Madden NFL 09. MMA fighter Josh Neer used this song as his entrance music during UFC 101. The song was used in the New York Knicks 2009-2010 intro video. The song was used in the NBC telecast of WrestleMania XXV, highlighting the match between The Undertaker and Shawn Michaels. Most recently, the song was used in a TV spot trailer for the 2011 remake film Conan the Barbarian. The song was also used for Shiima Xion during his run in the indy circuit.

For the 2011 - 2012 season, the Milwaukee Admirals of the American Hockey League used the song for their pre-game player introductions.