"Tonight" is a song written by David Bowie and Iggy Pop for the latter's second solo studio album, Lust for Life, released in 1977. The song was later made into the title-track for Bowie's own album Tonight.

Bowie covered the song with guest singer Tina Turner in 1984 for his sixteenth studio album of the same name. One of three tracks on the album to be a cover version of an Iggy Pop song, it was recorded as a duet with Turner but the single release was only credited to Bowie. The original spoken word introduction of the 1977 version, establishing that the lyric is addressed to a lover dying of a heroin overdose, was excised from Bowie's version because Bowie regarded the introduction as an "idiosyncrasy" of Iggy Pop that did not match his own personal vocabulary. Bowie also stated that he didn't want to "inflict" that part of the song on Tina Turner, either. The reggae-style song reached No. 53 on the UK Singles Chart.

David Bowie would perform the song live with Tina Turner at the latter's 23 March 1985 concert at the National Exhibition Centre in Birmingham. This version was included on Turner's live album Tina Live in Europe three years later, and also released as a single in late 1988, then becoming a number-one hit in the Netherlands.

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