So, the JLS story has (almost) come to an end. As boy band break-ups go it's hardly on the scale of Take That, but with four top-three albums and five Number One hits since 'The X Factor' spat them out in 2008, they're still kind of a big deal. What Marvin Humes, Oritsé Williams, J.B. Gill and Aston Merrygold – the only pop star with the name of a hobbit – will do next is anyone's guess, although if their luck holds they'll probably end up with knighthoods before the decade's out. But we're getting ahead of ourselves – before the official 'hardest-working band in the UK' part ways, there's a greatest hits arena tour and compilation. They return to The O2, a venue they've played several times before, to implore the audience to put their hands up and say 'oh oh oh oh oh oh' for the last time until 'The Big Reunion 2020'.