VAN HALEN guitarist Eddie Van Halen will make a rare recorded appearance on TOTO guitarist Steve Lukather's upcoming Christmas album, Santamental, due in September, according to Launch.Van Halen reportedly appears on a rendition of the standard "Joy To The World" that Lukather stated would sound a bit different than what most people would expect. "I did a version of 'Joy To The World' that sounds like it's 'Hot For Teacher' or 'Space Boogie'. It's that tempo, that groove, and we rearranged the voicings around the melody. Me and him go back and forth on some solos. He's one of my oldest buds," he said. As for Van Halen's personal life, Lukather did not wish to discuss the subject except to say that he felt both the guitarist and his band are doing OK. "I know too much but I can't tell you anything. I'm sworn to secrecy. Those guys are fine. I think they're sitting back and kind of laughing at what their old singers are doing," Lukather said, referring to former VAN HALEN frontmen David Lee Roth and Sammy Hagar, whose are in the middle of a joint co-headlining tour.