(L to R) Stephen Hiird / Reuters / Corbis ; Lynn Goldsmith / Corbis

Just look at the picture above. Who looks more heavy metal to you? Well, apparently you were not a member of the Recording Academy circa 1988. The first instance of a category for Hard Rock/Metal, the award was given to the flute-tastic Jethro Tull's Crest of a Knave over Metallica's And Justice For All. Fans (and even some audience members) were rightly outraged, though Tull's record label tried to make light of the faux pas by placing a Billboard ad that read, "The flute is a heavy, metal instrument." When Metallica later won a Grammy for 1991's Metallica, they thanked Jethro Tull for not release a competing album.