Susan Boyle holding a framed photograph of her Irish parents Patrick and Bridget

UPDATE! Check out our coverage and video of Susan Boyle at the O2 Center in Dublin... Click here

Time is running out for Susan Boyle fans in Dublin.

With less than 30 hours to go, organizers are still unsure if Susan Boyle will perform at the O2 Arena in Dublin.

Organizers David Ian Productions said the popular star of Britain's Got Talent was making her decisions on a "day-to-day" basis.

A spokesperson said: "We are led by her on a daily basis. We check in with her each morning to see how she's feeling and she lets us know, through her people, if she'll be there on the night."

"We'll have to check in again on the day and see how she is. We always have to wait until the morning of the show to get absolute confirmation from her."

The troubled singer has missed several dates on the tour which showcases all 10 of the Britain's Got Talent finalists.

Boyle, whose parents came from Donegal, shot to fame after her breathtaking audition on the show back in April.

She dedicated her success on the show to her late mother Bridget who died in 2007.

Boyle is clearly the main attraction of the show for Irish fans who have been lighting candles in churches in Dublin for her.

In Donegal today, Nancy Sheeran, 54, said she would boycott the concert if Boyle did not appear.

"The only reason I bought a ticket was to see Susan," she said.

"She has become such an inspiration for lonely women."

"She's come out of absolutely nowhere and blown everyone else off the stage.

"The organizers should make sure she is well enough to perform but if she's not singing, I'm not going.

"I've no interest in seeing a bunch of teenagers with their whole lives ahead of them.

"I want to see this woman who was written off by everyone and then stunned the world."

Boyle became an international household name after her stunning audition on the Britain's Got Talent show.

Her clips on YouTube have been watched more than 100 million times and the star now has her own channel.