Born in 1954 at Sun Records studios when Elvis Presley, Scotty Moore, and Bill Black recorded "That's All Right Mama," Rockabilly reflects the collision of country and western with rhythm and blues. Unrepentantly white and southern, Rockabilly is marked by hiccupping vocals, trebly guitars and walking basslines. Seminal artists include the Sun-era Presley, Carl Perkins, Charlie Feathers, and Johnny Burnette's Rock 'n' Roll Trio. In the early '80s, purist revivalists like the Stray Cats brought Rockabilly to a new audience, and current disciples are often lumped into the Swing or Alt-Country categories. Psychobilly is a bizarre, raucous offshoot of Rockabilly, popularized by the Cramps and Mojo Nixon in the '80s and the Reverend Horton Heat in the '90s.