Fresh off his triumphant Grammy Awards performance, Justin Timberlake has dropped another song from 'The 20/20 Experience.' 'Mirrors' is an emotional eight-minute mid-tempo track that finds the singer salvaging a perfect union that somehow went sour.

That sounds a lot like Timberlake's relationship with Jessica Biel, which fell apart at one point but ended with the couple's marriage last year. Justin sings, "I don't wanna lose you now / I'm looking right at the other half of me." The lyrics continue, "It's like you're my mirror / My mirror staring back at me / I couldn't get any bigger / With anyone else beside me / And now it's clear as this promise / That we're making two reflections into one."

Of the four new JT tracks we've heard so far, 'Mirror' sounds the most like the music on the singer's last album, 'FutureSex/LoveSounds.' We'd prefer to see Justin innovating and moving forward instead of back, but it's okay because the song relies on Timbaland's familiar handclap-style beats and layers of synths and vocals, which instantly embed their way into your brain.

When the song reaches its logical conclusion around the five-minute mark, it keeps on going, just in case Timberlake hasn't made his point. Over a bed of gentle piano twinkling and a distorted Timbaland vocal loop, JT delivers some falsetto crooning and a heavy dose of "oohs" and "aahs" for another three minutes.

Justin wins over our hearts and simultaneously throws down a challenge to his contemporaries in pop music: This is how you do a love song.

Listen to Justin Timberlake, 'Mirrors'