"Trent Reznor wants to be friends on Facebook" — the phrase does not roll off the tongue. But with help from producer Atticus Ross, Reznor has made a solid soundtrack to David Fincher's movie by doing what he's always done: creating grand industrial rock, including a stormy, synth-powered version of Edvard Grieg's orchestral "In the Hall of the Mountain King." It's creepy mood music for the brave new world, where all "friends" are virtual.

Peter Travers: The Social Network and 12 More Movies That Defined a Generation

“Everyday People”

"Everyday People" managed to trailblaze in two different ways -- it was one of the first pop hits to deal with the subject of racial harmony, and it utilized Larry Graham's "slap" technique on the bass guitar, which would soon be copied by countless other bassists. Graham once said about his pulsating style, "I'd never done that before … that's where the freedom of creativity came in for the band, that we'd be allowed to do that." In 1978, the song's line "Different strokes for different folks" would be borrowed for the title of the hit television show Diff'rent Strokes.