Three Islamic groups have expressed their opposition to the concert on June 3, demanding it be stopped, national police spokesman Saud Usman Nasution said by telephone.

Indonesia, a secular state, has the world's largest population of Muslims as well as significant minorities of Christians, Buddhists and Hindus.

"She's a vulgar singer who wears only panties and a bra when she sings and she stated she is the envoy of the devil's child and that she will spread satanic teaching," said Salim Alatas, the Jakarta head of hardline Islamic Defender Front (FPI). "This is dangerous."

More than 30,000 concert tickets from a total of 40,000 tickets had been sold, said the Jakarta Post newspaper. Tickets ranged in price from 465,000 rupiah ($50.35) to 2.25 million rupiah ($240). ($1 = 9235 rupiah)

(Reporting by Olivia Rondonuwu; Editing by Matthew Bigg and Jeremy Laurence)

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