Van Halen's famous (or infamous) 'no brown M&Ms' tour rider. For years, it was believed to be some sort of rock urban legend, that the world-famous band actually demanded only certain candies were allowed to be backstage at their concerts.
As it turned out, the stipulation was true. In the 53-page document, which you can view here, the band made it quite clear in the 'Munchies' section of their tour rider: "M&M's (WARNING: ABSOLUTELY NO BROWN ONES)."
The group also requested "herring in sour cream," four cases of "Schlitz Malt Liquor beer (16 ounce cans)," a total of eight bottles of wine and liquor, along with "One (1) large tube KY Jelly."