LONDON, U.K. --

During her extended stay in a London hospital, Amy Winehouse was tested for tuberculosis, however the tests came back negative, a rep for the singer told People.

“She has a chest infection and she had a routine test for TB, which came back negative,” Chris Goodman told People.

The embattled chanteuse was hospitalized after collapsing on Monday at her home in north London following an autograph session with some fans.

Winehouse has been undergoing tests to determine the cause of her fainting spell.

Goodman denied a report from the UK tabloid, The Sun, that Winehouse has been coughing up blood at the medical facility.

Her physical issues have also jeopardized her scheduled performance at the June 27 concert to celebrate Nelson Mandela’s 90th birthday in London.

The rep said Winehouse has a “50/50” shot of being able to perform.

“She would really love to do the show – she always wants to do these things,” Goodman added. “But she will listen to her doctors.”

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