When the 1990s began, Billboard magazine published two rock charts, Album Rock Tracks and Modern Rock Tracks, and the two formats played a decidedly different set of artists with a few exceptions. Crossover between the two began to increase, however, with the rise and emergence of alternative rock such as grunge and a heavier sound that appealed to both genres. Mainstays on the Album Rock chart, such as Def Leppard, Tom Petty and the Heartbreakers, and Van Halen were being mixed in with alternative bands such as Pearl Jam, Red Hot Chili Peppers, and Stone Temple Pilots, to name a few, by the middle part of the decade. The progressive rock of Rush's "Show Don't Tell", the final song to top the chart in the 1980s, had evolved into the post-grunge sound of Creed's "Higher" by the end of the 1