What You Don't Know (Exposé song)

"What You Don't Know" is a song recorded by American Latin freestyle vocal group Exposé for their 1989 second studio album of the same name. Written and produced by the group's founder Lewis A. Martineé, the lead vocals on "What You Don't Know" were performed by Gioia Bruno.

"What You Don't Know" was released as the lead single from the album on May 20, 1989, by Arista Records, and peaked at number eight on the US Billboard Hot 100 in July 1989, extending the group's streak of consecutive top-ten US pop hits to five. On the Billboard Dance Club Songs chart, it reached number two and number eight on the Billboard Dance/Electronic Singles Sales chart. It was the first single by the group to be certified Gold by the Recording Industry Association of America (RIAA). In the United Kingdom, the single peaked for two weeks at number 99 on the UK Singles Chart in September 1989.