When you hear Renata Rosa, you can hear that her music sounds somewhat tribal even though she's a Brazilian singer. In her music, she sings the traditional Northeast Brazilian chants. Her music has been influenced by the Maracatu Rural (Brazilian carnival music), the Coco (music from northern Brazil, that's been influenced by African music) that and the Cavalo Marinho (Brazilian folk music). She also keeps her cultural origins alive by teaching the Samba de Coco. This dance is a variant of the Coco dance, which originates from the time when the slaves from central Africa brought their culture to Northeast Brazil, so that their cultures fused together. The dance usually centres around the way in which houses made from clay and straw are constructed.
You can find out much more about her with this link but I haven't got time to tell you anymore: http://www.last.fm/music/Renata+Rosa/+wiki