"Secret" is a song recorded by American singer and songwriter Madonna from her sixth studio album Bedtime Stories (1994). It was released on September 20, 1994, as the lead single from the album by Warner Bros. Records as well as Maverick and Sire. The song was later included on her greatest hits compilations GHV2 (2001) and Celebration (2009). "Secret" was developed based on a demo version created by producer Shep Pettibone, which was reworked by Dallas Austin, with whom Madonna was working on Bedtime Stories. Written and produced by the singer with Austin, an additional writer on the track was Pettibone. The song was a departure from the style of music that Madonna had previously released; up to that point in her career her music had mostly been big-sounding dance tracks or melodic ballads. "Secret" combined pop and R&B genres with instrumentation from acoustic guitar, drums and strings, while lyrically talking about a lover having a secret, as well as how Madonna realized that one's happiness is under one's control.

The song was released accompanied by eight different remixes by DJ Junior Vasquez, who just re-used Madonna's vocals, but changed the composition of the track completely. Unusual for the mid-1990s, Madonna talked about the new single on the Internet leaving an audio message for her fans, as well as a snippet of the song. "Secret" received favorable reviews from music critics, who praised Madonna's vocal delivery and its mid-tempo R&B groove, deeming it seductive and soulful. The song was also a commercial success. In the United States, it peaked at number three on the Billboard Hot 100 and was certified gold by the Recording Industry Association of America (RIAA). In the United Kingdom, it reached a peak of number five, becoming her record-breaking 35th consecutive top-ten single on the UK Singles Chart. Elsewhere, it reached number one in Canada, Finland and Switzerland, and the top five in Australia, Denmark, France, Italy, New Zealand and Spain.

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