Music
Rex Features
The singer was due to perform at Mandela's 90th birthday celebration on June 27, followed by Glastonbury the following day.
However, her schedule has been thrown into doubt after she was hospitalised for fainting at her home on Monday.
Her spokesman told the BBC: "At present she still intends to perform at her two scheduled dates next week. However the decision will be made entirely on the advice of her doctors and in her best interests.
"Amy has undergone more scans and tests today and we are awaiting the verdict of her doctors."
> Winehouse to stay in hospital for tests
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