As Southern rock flourished, veteran country artists incorporated rock into their music in this genre. Songwriters/guitarists such as Willie Nelson, Waylon Jennings, and Hank Williams, Jr. shed formulaic Nashville sound, grew long hair, and replaced rhinestone-studded suits with leather jackets. Outlaw country artists spoke openly about smoking marijuana. Fiercely independent, the "outlaws" abandoned lush orchestrations, stripped the music to its country core, and added a rock sensibility to the sound. At the same time, outlaw country performers brought back older styles that had fallen into disuse, such as honky tonk songs and "cowboy ballads". As well, Nelson and Jennings incorporated more R&B and soul music into their country music by working with Memphis and Muscle Shoals Rhythm Section musicians.