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Smooth Breakfast with Gary King 6am - 10am
20 October 2017, 15:27 | Updated: 2 November 2017, 15:29
We love a good duet. Elton and Kiki, Dolly and Kenny, John and Olivia. All amazing.
But sometimes duets happen just once, and are largely forgotten over time. However, thanks to the age of YouTube and social media, we can be reminded of these pop gems again.
This week, we're looking back to 1990, and when two of America's finest ever singers teamed up: Whitney Houston and Stevie Wonder.
'We Didn't Know' was a mild hit in the States for the duo in 1992, having recorded it for Whitney's album I'm Your Baby Tonight two years previously. It wasn't a success in the UK.
The one and only time they performed it together was on The Arsenio Hall Show in 1990 - and you can watch a clip from the performance above.
The song was written by Stevie, and is about two long-time friends that realize that they have romantic feelings for each other, and that they "didn't know" until now.
No music video was made for the song, but you can listen to it in full below: