Alice and Rob have been a mutual appriciation society for some years, which initially resulted in the track "Hands Of Death" on "X-Files:Songs In The Key Of X" and later in remixed form on the "Life And Crimes Of Alice Cooper" box set.

As the years have gone by Rob and Alice have appeared many times together, mainly at awards shows (including the 'Rock and Roll Hall of Fame' in 2011) where Rob presents Alice with some award or other, but also performing. In 2009 the pair finally toured together under the 'Gruesome Twosome' banner. Both bands had equal stage time with Zombie always closing the show, being that he was probably the biggest of the two artists at that point.

Alice performed 'School's Out' with White Zombie at Irvine Meadows Ampitheatre on Halloween October 28th, 1996. Here's what Rob Zombie and John Tempesta (drummer) had to say to 'Metal Edge' after the show:

Metal Edge: I know you're a big Alice Cooper fan, Rob. What was it like having him on stage with you?

Rob: "It was awesome, it was this dream come true thing, but it flew by and now I'm searching my memory 'cause it's like a blur. Somebody filmed it and I was watching the film and seeing all the things that people tell me happened. I talked to him on the phone last night. He's the coolest guy."

John: "That was amazing. We soundchecked that day with him, but that night he came out in full costume and it was "Wow!," cane and everything. The crowd was going crazy yelling "Alice! Alice!" I wish he could do it with us every night. The crowd definitely dug it."

Alice wrote some sleeve notes for the 2003 Rob Zombie compilation album'Past, Present and Future':

"Watching a Zombie concert is like seeing every drop of ink coming to life in a tattoo parlor.... Frank Zappa once told me, "It's simply this........ Either you get it or you don't" Rob gets it.
To be able to balance lyrics, songs, visuals, humor, horror and make it work? Few can do that. He has the uncanny ability to write musically clever hooks like "Living Dead Girl" and "Never Gonna Stop" with a heavy handed industrial bottom which few others can match. Anyone that would even think about writing a song about Herman Munsters racing car "Dragula" is alright in my book. Rob is a true rock monster. There aren't many of us left. So shut off the lights, light a candle, turn up the volume, and be prepared to travel into the nightmare that is Rob Zombie"
Alice Cooper --- July 2003

In 2010 Rob Zombie reissued his first solo album 'Hellbilly Deluxe' with a bonus DVD. One the bonus DVD tracks was 'School's Out', filmed live with Alice.

In 2011 Rob appeared on the 'Welcome 2 My Nightmare' album playing 'The guide' on 'The Congregation'. Zombie's regular guitarist John 5 also the shredding solo on 'Disco Bloodbath Boogie Fever'.