Boyle, 48, had been expected to triumph after her performance in April of "I Dreamed a Dream" catapulted her to international superstardom. But the dance troupe Diversity have been crowned the winners of Britain's Got Talent 2009.
The 10-member troupe from Essex, England and London who won by public vote receives 100,000 pounds ($160,000) and will perform at the Royal Variety Performance in front of the Queen on December.
In third place was saxophonist Julian Smith.
See Britain's Got Talent 2009 Finals performances below:
Diversity - Britain's Got Talent 2009 Finals
Susan Boyle - Britain's Got Talent 2009 Finals
Julian Smith - Britain's Got Talent 2009 Finals