The always stylin' Lenny Kravitz brought the rock…and the 'Rock Star City Life' to the elimination episode of 'X Factor' tonight (Dec. 8). Kravitz kicked off the show with first half of the song from his recently released new album 'Black and White America.' Kravitz then launched into his biggest hit, 1993's 'Are You Gonna Go My Way.' There's no way the superstar could perform on the show without dipping into his catalog, which is overflowing with hits. Needless to say, he chose wisely.

Kravitz, looking every inch the rock star, especially with his aviator shades, knuckled down on his guitar and amped up the crowd. The amps felt as though they were cranked to 11. It was refreshing to see a bona fide rock star perform on the show tonight, since the guest performers have been heavy on the pop side of things.

We have to assume that the nervous contestants who are anxiously awaiting their fate were grooving backstage to Kravitz. The music and the performance energy were that infectious. LK really turned up the volume and brought the r-a-w-k on the 'X Factor' stage.

Watch Lenny Kravitz Perform on 'X Factor'