"What Goes Around . . . Comes Around"
The telling lyrics: "I heard you found out / That he's doing to you / What you did to me / Ain't that the way it goes."
Who it's supposed to be about: Britney Spears
Why? Even though Timberlake insisted the song is about his friend Trace Ayala's breakup with actress Elisha Cuthbert, many people thought it was a sequel to "Cry Me a River," as he sings about being betrayed by an ex lover who cheated on him.