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Dozens of gay and lesbian couples have tied the knots under Brazil's new same-sex union laws in a bid to set a new world record for mass gay weddings.

Nearly 50 homosexual couples exchanged vows under Brazil's landmark law in an attempt to break a world record.

Brazil's Federal Supreme Court legally recognized same-sex partnerships in May, in a landmark case for gay rights in a country with the world's largest population of Roman Catholics.

Ghada Nassef reports.