"Sexy! No No No..." is a song by British girl group Girls Aloud from their fourth studio album, Tangled Up (2007). In 2007, the group announced that they would release a new album, due in November of that year. In July 2007, it was announced that "Sexy! No No No...", due to be released in September, would be as the first single from Tangled Up, with a radio premiere scheduled for 20 July. The track leaked a few hours prior to the premiere. "Sexy! No No No..." was written by Girls Aloud and Xenomania, and is an electropunk song that incorporates a sample of Nazareth's 1975 song "Hair of the Dog", for which they received a writing credit. Composed of three songs welded together, the song avoids the verse-chorus form present in most contemporary pop music.

"Sexy! No No No..." received generally favourable reviews from music critics, and peaked at number 5 on the UK Singles Chart, continuing the band's string of hits by becoming their fifteenth consecutive single to chart within the top ten. The song also peaked at number 11 on the Irish Singles Chart. The accompanying music video was directed by Trudy Bellinger, and features the group singing and dancing through pins and wires in black PVC catsuits and red dresses. To promote the song, Girls Aloud performed "Sexy! No No No..." at Dance X, ITV1 special Saturday Night Divas and T4 on the Beach. The track was also included in three of the group's concert tours, 2008's Tangled Up Tour, 2009's Out of Control Tour and 2013's Ten: The Hits Tour.

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