Backstreet Boys' 'I Want it That Way' remains a stone-cold nineties pop classic, and we will fight anyone who says otherwise.

Remarkably, the song is 20 years old next year (sob), but it remains recognisable to a generation - meaning that it made for the perfect song to get the 'Classroom Instruments' treatment with Jimmy Fallon and The Roots.

The boyband turned up on Fallon's show in full all-white regalia - matched by Fallon and The Roots, too, of course - and it actually kinda works when played in such a manner.

Watch it below: