From his appearance, I expected him to play something by Megadeth or Black Sabbath.

NEWYORKER: Romance

The event, formerly known as Monsters of Rock, also features performances from Biffy Clyro, Soundgarden and Megadeth.

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Slayer, co-founded by Hanneman and Kerry King, became one of the "big four" thrash metal groups of the 1980s, along with Anthrax, Megadeth and Metallica.

BBC: Jeff Hanneman, Slayer guitarist, dies at 49

Case in point, just search the words "Guitar Hero" on YouTube and you'll find nearly 60, 000 videos, like the one with a five-year-old kid who now, thanks to the game, plays and sings along to Megadeth...

NPR: 'Guitar Hero' Game Earns a Following

The letter is signed by a host of high profile artists from across the musical spectrum: Katie Perry, Sheryl Crow, Rihanna, Pink Floyd, Blondie, Bill Joel, Amy Grant, Megadeth, CeeLo Green, Ted Nugent and the Dead Kennedys.

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