OK Go is an American alternative rock band originally from Chicago, Illinois, now based in Los Angeles, California. The band is composed of Damian Kulash (lead vocals, guitar), Tim Nordwind (bass guitar and vocals), Dan Konopka (drums and percussion) and Andy Ross (guitar, keyboards and vocals), who joined them in 2005, replacing Andy Duncan. They are known for their often quirky and elaborate music videos.
The original members formed as OK Go in 1998 and released two studio albums before Duncan's departure. The band's video for "Here It Goes Again" won a Grammy Award for Best Music Video in 2007.