Whatever Happened to Slade is the seventh studio album by the British rock group Slade. It was released on 21 March 1977 by Barn Records, but did not enter any national album chart. By the time of the album's release, Slade's popularity was waning as were their record sales, which they acknowledged in the album's title. The glam rock movement, of which Slade were associated, had died, and the careers of other glam rock artists such as Mud, Gary Glitter and Sweet had also died. In Britain, where Slade had traditionally been most popular, the fashion of the day was punk rock. With this album, Slade firmly stood its ground as a straight rock group, and gone were their "glam" statements of the early decade.

The album was met with critical praise and support from the English punk uprising. Nevertheless, the record was a commercial failure and the band's financial woes continued. For many years, the album was a much sought-after collector's item amongst fans. However, the album is available today via CD remaster from 2007 and download. In later years, the album became a popular trade amongst American musicians developing what would be known as "grunge" as both Billy Corgan (Smashing Pumpkins) and Kurt Cobain (Nirvana) have cited the album as influential. The album was voted No. 1 of the top three Slade albums in the Slade Fan Club Poll of 1979.

By 1975, Slade felt their commercial success had peaked in Great Britain and Europe. At manager Chas Chandler's suggestion, the band agreed to move to the United States, the only major territory that the band had yet to crack. The band held out in the US for almost two years, recording the soul-influenced Nobody's Fools (1976). Although the band did not achieve significant airplay and record sales in the US, their reputation as a reliable and exciting live rock act was enhanced and the band felt rejuvenated.

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