Carnaval 2013: Brazil's Annual Celebration Not Just About Samba (PHOTOS)

RIO DE JANEIRO -- The crowd gathering Saturday was a typical Rio Carnival mix: a sprinkling of superheroes, girls in cute bunny outfits, zombies and princesses, a group of hairy-chested hula dancers. But the sound sure wasn't samba. "You and I must make a pact," a high-pitched voice sang in English, soaring above the crowd. "We must bring salvation back."