"We did the Adore tour, and we got pretty friendly. His approach is so unconventional. You can throw the weirdest sh*t at him, and he'll do something pretty over it. He's a virtuoso. I really heard piano when I saw the footage, but my piano playing is pretty sh*tty. He ended up writing some of the themes." - Billy on working with Mike on Stigmata.

Here are the songs which feature piano or keyboard.