"Oh my goodness", she said, struggling to gather herself.
Iggy Azalea wrote, "Woah Cardi B won!"
Cardi has rekindled her relationship with formerly estranged husband, and father to Kulture, Offset, after breaking up at the end of previous year following a cheating scandal. It looks like Cardi B had been waiting for this moment when she immediately bursted into tears of joy after hearing the sweet word.
She also thanked several of her collaborators, including J Balvin and Bad Bunny. Cardi shared onstage, adding with a laugh, "Maybe I need to smart smoking weed".
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Cardi reposted a screen grab of the one article she was talking about in the video.
"Oh my god, oh my god", she says, covering her mouth and bursting into tears. It's because, you know, when I found out I was pregnant, my album was not complete.
Watch the full performance of "Money" below.
She went onto thank daughter Kulture and touched on her fears surrounding giving birth shortly after dropping the album.
Lady Gaga and Bradley Cooper have won the Grammy Award for best pop duo/group performance for the song "Shallow" from "A Star Is Born".