Aoife Kilbane from Barna, Co Galway has been offered €10,000 by a listener to the John Murray Show on RTÉ Radio 1 to help her study at the London School of Musical Theatre from September.
Kilbane was one of the entrants in the show's Search for Sandy competition in conjunction with the Gaiety Theatre but did not make the final round.
The 22-year-old has just completed a year's training at Musical Theatre Ireland in Cork.
Her fees to study in London are around £14,000.
On hearing of the offer from the listener, who wishes to remain anonymous, Kilbane broke down in tears.
"I don't know what to say," she said. "I don't know where I would have gotten that otherwise. It makes the difference between going and not going."