"Animal I Have Become" is a song by Canadian rock band Three Days Grace. It was released on April 10, 2006, as the first single from their second studio album, One-X. The song was released digitally on April 18, 2006. The song spent seven weeks at No. 1 on the US Mainstream Rock Tracks chart and two weeks at No. 1 on the US Modern Rock Tracks chart. The song alongside "Riot" are used in the video game, WWE SmackDown vs. Raw 2007. It is the band's first single with their fourth member Barry Stock. Critical reception to the song was generally favorable, with emphasis on the song's catchiness combined with its thick guitars.