Last year Frank Ocean released a 10-minute song about a stripper. So why shouldn't Justin Timberlake be allowed to get his prog on with an eight-minute song about a girl who's just like his mirror? Produced by Timbaland, this non-single from The 20/20 Experience is certainly the artiest song Timberlake's ever wrapped his pipes around – from the emo power-ballad guitar strobes to the stark hand-clapping bridge to the orchestral flares to the electro blips, chipmunk synth chirps and vocoder-squawk backing vocals that ornament the climactic last minute or so. Yet it's still unmistakably a JT joint, replete with laidback soulfulness, mountain-climbing croon and falsetto butter – like how Kraftwerk might do Al Green, if they'd just spent a night in an Atlanta strip club.

“Is It True”

As the British Invasion reached its peak in 1964, Brenda Lee went from Nashville to London to record one of her hardest-rocking hits, her perky vocal backed by a stuttering, squalling guitar. That guitar was played by session musician Jimmy Page, yet to skyrocket to fame with first the Yardbirds and then Led Zeppelin. "She said to me, 'I've come here to make a record with the British sound,'" remembered producer Mickie Most. "She felt she wouldn't get the same sound in Nashville because they're only just catching up on the British beat group sound of about six months ago."