Aerosmith guitarist Joe Perry showed up at one of Lenny Kravitz's Las Vegas shows, and joined the band onstage! Kravitz posted a photo on his Facebook page, with the caption "Joe Perry, you killed 'Are You Gonna Go My Way.' Thank you. Lenny."

Kravitz was also joined by Slash, about which he wrote, "Slash, thanks for rocking 'Always On the Run' with me in Vegas. Miss you. Lenny."

The photos (click "Show Media" to see both) were shot by Mathieu Bitton.