The sheer power and long-lasting impact of Jerry Lee Lewis’ signature rock ’n’ roll classic, “Whole Lot of Shakin’ Going On,” tends to obscure the fact that The Killer was far more successful as a country act, scoring only half a dozen pop hits but notching dozens of country hits over a three-decade period. Ultimately, Jerry Lee transcends stylistic distinctions, as evidenced by the lineup of rock, pop and country stars who joined him on a mixed-genre set of cover tunes for 2006’s career-rejuvenating Last Man Standing. His latest, Mean Old Man, repeats that winning formula, though this time Jerry Lee skews further toward the country side of the fence. Whether it’s Tim McGraw, Sheryl Crow or Rolling Stone Mick Jagger sharing the mic with a still-sturdy Jerry Lee, steel guitar and shuffle rhythms dominate the disc. Even so, JL offers enough attitude and ivory rattling to make Mean Old Man a testament to his rock ’n’ roll legacy. At 75 years old, that’s no mean feat.