Alice Tan Ridley, a Subway Singer Who Dazzled on ‘America’s Got Talent,’ Dies at 72
www.nytimes.com
The mother of the actress Gabourey Sidibe, she spent decades singing full time as a busker in the New York City subways.

From the New York Times:

The mother of the actress Gabourey Sidibe, she spent decades singing full time as a busker in the New York City subways.