Ibeyi: 20-year-old twins with haunting and melodic songs

It took only one Yoruba chant before Ibeyi had fans swaying drowsily under their spell.Lisa-Kaindé Diaz and Naomi Diaz, the twins who make up Ibeyi, slunk onto the 9:30 Club stage on Wednesday like priestesses preparing for a solemn ritual. And in some ways, they were: They started off the show with the a cappella "Eleggua," a throaty hymn that worships a spirit in the West African Yoruba culture, from which the French-Cuban sisters descend.