What You Don't Know is the second studio album by American girl group Exposé, released on June 13, 1989, by Arista Records.

It was made available in vinyl, cassette, and CD formats.

The remixes of the tracks "What You Don't Know" and "When I Looked at Him" appeared only on the CD.

All tracks are written by Lewis A. Martineé, except where noted

^ Shipments figures based on certification alone.