"Untouchable" is a song performed by British all-female pop group Girls Aloud, taken from their fifth studio album Out of Control (2008). The song was written by Miranda Cooper, Brian Higgins and his production team Xenomania, and produced by Higgins and Xenomania. Influenced by trance music and Balearic beat, the album version of "Untouchable" is over six minutes long. Remixed for single release in April 2009, "Untouchable" memorably became Girls Aloud's first single to miss the top ten on the UK Singles Chart. The song received generally favorable reviews from most contemporary music critics, who praised its ambition. "Untouchable" would be the final release by the group before their hiatus.

In the music video, inspired by Stanley Kubrick's 2001: Space Odyssey, the group travels through space and approaches Earth in illuminated glass spheres (resembling meteorites). "Untouchable" was promoted through an appearance on Dancing on Ice and the group's Out of Control Tour, during which the song was performed.

"Untouchable" is a trance-inspired "rave ballad," which marries "Balearic guitar lines with a pulsating techno throb." The song is Girls Aloud's longest yet, at a full runtime of 6:45. "Untouchable" follows the common verse-chorus form, but includes a number of instrumental solos. Nadine Coyle sings a middle 8 ("Without any meaning, we're just skin and bone...") as the music drops out. The song builds back up and concludes with a final chorus.

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