From the kids playing cans in streets, or a native indian playing on a flute to great (jazz, blues, classical, rock, pop, hip-hop, etc...) names/bands, it's kinda hard to choose a favorite.
RHCP, RATM, Bob Marley, Marcelinho da Lua, Audioslave, Chico Science e Nacao Zumbi, Fernanda Abreu, Gabriel o Pensador, Patrice, Pink Floyd, Incubus, Metallica, Missy Elliot, Gilberto Gil, O Rappa, Bach, Alicia Keys, Santana, Ben Harper, Israel Kamakawiwo, Jimmy Cliff, Sting, The Police, Gotan Project, Enigma, Muse, Gentleman, Tabu Ley Seigneur Rochereau and Afrisa International Orchestra, Dream Theater, Anthology, Pearl Jam, Djavan, Ray Charles, Stevie Wonder, Robert Johnson, Linkin Park, The Editors, etc. etc. etc..