In October of that year, engineer Michael Ashby, posted a picture of his computer screen on his Instagram Story and the file name 'Cardi B ft Beyonce demo' clearly on display.
He was then forced to apologise for the leak, but Cardi denied she had ever met him and that the song even existed.
However, a snippet of the song, believed to be called 'Wet', was leaked online.
Producer J White Did It - who co-produced Cardi's breakthrough hit 'Bodak Yellow' - has since claimed the track was definitely made, but that the pair decided to scrap it after the leak.
In a new video interview posted on social media, J - who has since teamed up with Beyonce and Megan Thee Stallion on their 'Savage' remix - explained: ''I was just as giddy as everybody else.
''I was sitting there just waiting, looking on the internet then it leaked.
''Bro, three years ago I had a Beyoncé play with Cardi and that kinda went sour because it went viral that they was doing a song together and that cut out
''This time the song leaked before the song came out ... But listen, that song came out when I say I sat like this [in silence] For like, 10 minutes.''
Cardi and Beyonce first met when the 'Press' rapper performed at her husband Jay-Z's Made In America festival in August 2017.
And the pair's fans demanded the 'I Like It' hitmaker and 'Crazy in Love' singer team up on a track after a picture of them at the event went viral.
These are the greatest songs from Foo Fighters.
It was a very female-centered show at the 2021 Brit Awards.
With a great deal of excitement, a lot of relief and some anxiousness, the biggest night on the UK's musical calendar went ahead as the BRIT's 2021...
Biggy Pop the cockatoo bops along to "UK music".
St. Vincent drops yet another video ahead of the release of her highly anticipated sixth studio album 'Daddy's Home', this time for track number...
This news certainly puts a smile on our faces.
Asleep In The Back is less claustrophobic than some of Elbow's other material, it doesn't envelope you and wrap you up, there is still wriggle room...
Put down the weight-loss smoothie and indulge in some carbs.