1. There are at least seven layers of simultaneous activity in the song: it’s as if Timbaland wanted to see how much he could pile on without creating atonality. First there is an arpeggiated keyboard figure, followed by male voices singing a bit of Gregorian-style chant. Next comes a steady, sombre pattern that sounds a little like the minor-key vamp in Ellington’s “East St. Louis Toodle-Oo.” Below it are four bass notes, recurring in chacona style. Now the angelic Timberlake enters, together with a more nasty-minded rhythm section, a vaguely Indian-sounding synthesized string orchestra, and, finally, sped-up versions of all the above.

    By Alex Ross. Here.