Britney, Jessica, Elisha: A Guide to Who Justin Timberlake's Songs Are About

The telling lyrics: "How do I ever explain what I've got with you? / I try to find the words but they hide and that's the truth / And nobody ever will understand what we do / There's only one me and you."

Who it's supposed to be about: Jessica Biel

Why? Not only does Biel appear in the music video, but Timberlake told Zane Lowe the song is about telling your partner how much you care about them.