"The Widow" is a song by The Mars Volta, from their second album Frances the Mute. The song was first performed in May, 2004 at the Wiltern Theatre in Los Angeles during The Mars Volta's three-night residence closing the tour supporting their debut LP, De-Loused in the Comatorium. At the concert, the song was dedicated to former Mars Volta member Jeremy Michael Ward, who had died of a drug overdose in May 2003. The song peaked at number 95 on the U.S. Billboard Hot 100, making it the band's first and only single to chart there. The song also reached number 20 in the UK Singles Chart and peaked at number 7 on the Billboard Modern Rock Tracks chart. The single was also released on vinyl under the title "Frances the Mute".

The song appeared on an episode of Rescue Me.

"The Widow" is notably the only short, pop-structured song on Frances the Mute, although the album-version features a lengthy, non-radio-friendly, atonal outro of organ and electronic spasms, taking up the later half of the track. The edit of "The Widow" cuts the last instrumental part of the regular album track and fades out when the vocals start to become distorted. It is also the only Mars Volta song to chart in the United States. The song is notable for its consistently high lead vocals which never go below the alto register.

The song features a brief trumpet part from Flea after the second chorus. Omar performs a brief solo in the same section. On the version of the single called "Frances the Mute", the studio version is replaced by a live recording of one of the first performances of the song at The Wiltern in 2004, and features only acoustic guitar and vocals, with some distortion effects.

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