Susan Boyle has dreamed a dream and is singing for the pope.

Boyle, the unlikely pop star who shot to global Internet fame after she sang on the TV show "Britain's Got Talent," was to reprise her winning performance of "I Dreamed a Dream" from "Les Miserables" during a Mass on Thursday celebrated by Pope Benedict XVI.

Boyle was also joining an 800-strong choir in singing hymns at Glasgow's Bellahouston Park.

In a pre-Mass statement, the Scottish-born Boyle said "it's a great honour to sing for the pope and it's something I've always dreamed of."

Benedict was capping off his first day of a four-day state visit to Britain that included a meeting with Queen Elizabeth II at Holyroodhouse Palace in Edinburgh.