Boadicea

Boadicea is the name of the 12th track on Enya's Celts CD. It is the melody of Boadicea that underlies the Fugee's song, Ready or Not.

Boadicea, or Boudicca meaning Victorious, was Queen of the Iceni tribe of East Anglia. She led a rebellion in 60 A.D. against the Romans, destroying the cities of Colchester, St. Albans and capturing London. She was eventually defeated by the Romans, and rather than be humiliated by them, she poisoned herself.
-- Roma Ryan, in Enya's The Celts CD booklet

As an aside, the Fugees originally used the melody without permission.

Merriam-Webster Online says that it's pronounced boo-dick-a, with the emphasis on boo.