So I've gone through and picked out songs which I think have interesting opening lines. Feel free to post here and say which ones you can identify. This way of choosing songs doesn't seem to lend itself to the whole guessing thing as well as the random way, but Google could still probably identify most of them for you, if you happen to be a cheater.
The ones that have been guessed already are in bold, because they're special.
1: "4-Aminobiphenyl, hexachlorobenzene"
2: "Alberto hits his brother on the back of the head"
3: "Ariella, 7:30, I don't want to get up yet"
4: "Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Ben Heaton"
5: "Found a job at the local high school"
6: "I don't care about the mutant chickens"
7: "I don't like Led Zeppelin anymore"
8: "I, man, am regal, a German am I"
9: "I saw a werewolf with a Chinese menu in his hand"
10: "One more young writer slid away in the night"
11: "Sausage, for example, gets a lot of attention from the government men"
12: "She runs in the shadow of a motorized race"
13: "She's a periodic table of the elements"
14: "The first nickel I ever earned"
15: "There's antimony, arsenic, aluminum, selenium"
16: "This must be the biggest K-Mart in the world"
17: "We're a band of vicious pirates"
18: "Your reflection is this equation in the other direction"
19: "You're sending me tulips mistaken for lilies"
20: "You're wearing your squeaky shoes"