"We Didn't Know" is a mid-tempo duet by Whitney Houston and Stevie Wonder, and was released as the sixth and final single from Houston's third album I'm Your Baby Tonight. The single peaked at number 20 on Billboard's R&B Singles chart. There was no music video made for the song.
The song is about two good friends that realize that they have romantic feelings for each other and are more than just friends — they love each other, and they "didn't know."
Read more about We Didn't Know: Track Listing, Personnel