Mystery Trio is a Brazilian Rockabilly band from Curitiba, Paraná, formed by Elvis Martinatto (Vocal / Guitar), Beto Glaser (guitar) and Luiz Fireball (acoustic bass). They began playing together in the second half of 2007 under the name of Flatheads, which in 2009 was changed to Mystery Trio, a pun on Mystery Train, one of the most famous songs recorded by Elvis Presley in his Rockabilly phase.