"Monster" is the second single from the 2009 album Awake by the Christian rock band Skillet, and is the second track on the album. The single went on to become the bands breakthrough single charting at No. 4 on Mainstream rock charts and No. 101 on the Billboard Bubbling Under Hot 100 Chart. A radio edit version can be found on the deluxe version, which does not include the growling part of the song. It is also the fifth single by Skillet to be released to physical media.
The single peaked No. 1 on Christian Rock radio, No. 2 on Christian Hard Rock radio, No. 20 on the Billboard Rock Songs chart, No. 7 on the Top Heatseekers, No. 4 on the US Active Rock charts, and number No. 4 on the Mainstream rock charts, making it the most successful single in the band's history. It is also the first single to make the Alternative Songs chart, debuting at No. 40, peaked at No. 28. On November 10 it was announced that the song had reached the "Elite 8" on MTV's rotation slot. The song was also the tenth most played Halloween song of 2010.
The music video for "Monster" was directed by the Erwin brothers, and was released on September 2, 2009 on Noisecreep. It features the band performing in a hospital room while in the next room, lead vocalist and bassist, John Cooper and guitarist, Korey Cooper, are being tested on and under observation from a medical team. The video cuts back to both Korey and John who wake up in different parts of the hospital while undergoing various tests. Eventually both escape while being chased by SWAT teams. The video ends with a dub over of a man reporting that there has been a "containment breach", and John and Korey walking out of the hospital into the sunlight. Guitarist Ben Kasica and drummer Jen Ledger both appear as doctors in the beginning of the video. Skillet released a making-of for the video in one of their podcasts. The video was featured on Fuse's Number One Countdown: Viewer's Choice at No. 1. As of April 2015[update], it has gained over 100 million views on YouTube.