Avril Lavigne is pop's presiding mean girl, sneering and snarling like a punk kewpie doll with Tourette's over some of the most sticky-sweet melodies ever to hit the Billboard charts. "What the Hell" is Avril in a nutshell: Co-written by Max Martin, it's an anthem about a good girl who goes on a crazy-bender, staying out late, swapping boys and exacting psychological revenge. She starts out defiant ("All I want is to mess around") and quickly turns vicious: "I am messing with your head/When I'm messing with you in bed." (In fairness, the dude has been pretty neglectful.) The music is easily some of Avril's catchiest yet, with piping garage-rock organs, a pogoing, do-the-frug beat and a soaring singalong chorus. It's strychnine disguised as bubblegum.

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“Baby Got Back”

While watching a Budweiser commercial during the Super Bowl, Sir Mix-a-Lot thought the skinny female models in the ad didn’t represent reality. So he wrote this ode to ample bottoms, featuring its famous to-the-point lyric: “I like big butts and I cannot lie.” MTV banished the video, featuring shaking booties and sexually suggestive fruit, to 9 p.m. or later. “I thought my career was over,” he told Rolling Stone. “Then I called Rick Rubin, and I told him the video was banned, and he was like, 'Great!' We sold another 2 million records.”