We don't know what we were expecting when this woman walked onto the X Factor stage last night, but we weren't expecting THIS!
When judges give the 55-year-old former music teacher the okay to "give it everything", Marivana Viscuso doesn't hold back and let's loose a beast of a voice!
Simon Cowell referred to it as "wolves mating in the forest" and, believe it or not, that's a compliment!
Hey, you gotta take what you can get from that guy and it looks like she appreciated it. Is this the next Susan Boyle?
Check out her awesome audition above!