What's more, their creation on reality show Popstars: The Rivals at the end of a golden pop era and the prospect of facing hordes of people armed with guitars and dodgy haircuts strumming mediocre pseudo-rock during the landfill indie period of 2004-2008 makes their milestone celebration all the more impressive.
It forced them to think outside the box from the off, employing surf guitars and a sultry, gang-like mentality for their debut single 'Sound of the Underground', once described by a journalist as being like a "five-headed Kylie Minogue". Much of their success can be attributed to production collective Xenomania, who on 2005's 'Biology' achieved the rare feat of creating a song that united both frivolous and serious music fans alike.
But given this is their second hits collection (after only another two studio albums), the focus is on material from the latter half of their career, including 2008's chart-topping Motown throwback 'The Promise' and their only single to lose out on a top ten placing (it peaked at 11), the wistful electro-club ballad 'Untouchable'.
But one thing Girls Aloud have never lost, even during their three-year hiatus, is their ability to know exactly what their fans want. As such, disc two is solely reserved for fan-voted favourites, the best of which is 'Black Jacks' from 2007's Tangled Up and 'Memory of You', a B-side from 2009's 'The Loving Kind'.
The result, as they've successfully managed throughout their career, is a carefully-balanced collection that should please both casual and dedicated fans. And as the set's brand new cuts 'On The Metro' and 'Every Now and Then' prove, the prospect of a new Girls Aloud album in 2013 would be a very exciting one indeed.
Tracks to download: 'Something New', 'On The Metro', 'Every Now and Then'
If you like this, you'll like: Sugababes, The Saturdays
Watch the 'Something New' music video below: