(CNN) Irish singer Sinead O'Connor has announced her conversion to Islam, changing her name to Shuhada' Davitt.

"This is to announce that I am proud to have become a Muslim," she wrote on Twitter on October 19. "This is the natural conclusion of any intelligent theologian's journey. All scripture study leads to Islam. Which makes all other scriptures redundant."

The singer added: "I will be given (another) new name. It will be Shuhada'."

She spells her new name, which means "one who bears witness" in Arabic, with an apostrophe at the end. Shuhada' comes from the Arabic word Shahada, the Islamic declaration of faith in which Muslims state (or bear witness to) their belief that there is only one God and Mohammed is his final prophet.

The name also means "martyrs" in Arabic.

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