Citing Lauren Maxwell's death certificate, TMZ said she died of a heart defect at home in Riverdale, Georgia.
Fetty Wap got emotional during an Instagram Live earlier this week, during which he held up a photo of his late daughter and kissed it.
"My little shorty," he said after wiping tears from his eyes.
He asked fans to "do him a solid" by posting butterflies in his daughter's honor.
Turquoise Miami, Lauren's mom, confirmed the toddler's death over the weekend.
Fetty Wap posted a photo of the girl on Tuesday.
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