06/19/2009 at 07:00 AM EDT
Susan Boyle canceled her Thursday performance in Liverpool – the second time she has missed a show on the current Britain's Got Talent
tour, after she failed to appear on stage last weekend in Manchester.
"She had a rest day," says her rep of this latest cancellation, while a source adds that, contrary to some reports, Boyle was not pining for her cat at home. "She certainly wasn't shouting out for Pebbles," says her rep.
Friday's Daily Mirror
claimed that Boyle, 48, suffered an hysterical screaming fit over her cat. Not so, says the singer's spokeswoman.
"She was feeling tired and she decided not to perform," says the rep.
Boyle's entourage – said to include a personal assistant and some security guards – apparently discussed the decision to cancel with the tour promoters, in the wake of Boyle's recent hospitalization
for exhaustion. The hospital stay took place shortly after Boyle placed second
in the finale of Britain's Got Talent
The TV and YouTube favorite was able to pull off a triumphant return
in Scotland Monday night before a crowd of 6,000 fans. The live concert tour stops in London this Sunday night, and is slated to conclude July 5.