Her family have asked for "prayers and privacy", the website reports.
The 76-year-old singer has been struggling with numerous health problems over the past few years.
The same year, she was also forced to deny a death hoax, after fake news of her death spread online.
Aretha Franklin's family are asking for prayers, according to veteran reporter Roger Friedman.
We're praying that Aretha Franklin can pull though and will keep you updated with more details about her condition as they become available.
In 2002, her eldest sister Erma died of throat cancer. It's not just that Rolling Stone called her the number one singer of all time, or that she is the Queen of Soul.
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Aretha's final public performance was at the Mann Center in Philadelphia in August 2017, where she reportedly battled through "exhaustion and dehydration" to "miraculously" complete the show. Yet reports by the National Enquirer put her extreme weight loss down to a cancer relapse and chemotherapy in 2017.
In an interview with Norman Jopling, which was first published in Record Mirror in 1968, Aretha talked about another of her popular songs, "I Never Loved A Man".
"I feel very, very enriched and satisfied with respect to where my career came from, and where it is now", Franklin said.
The following month, she canceled a concert in Toronto scheduled for July because of "doctors orders", according to the Daily Mail. Her undisclosed illness has resulted in several concert cancelations.
During her incredible career, the soul star has gained 17 Grammy awards, three special recognition prizes and a Golden Globe.