Girls' Generation are back, just in time (naturally) for their tenth anniversary. Cause for celebration, to be sure, but hardly unexpected: making it this far in an industry seemingly renowned for its lack of attention span is no small feat. Groups come and go often in what's the blink of an eye for American pop units, but SNSD (as they are often called in Korea and by K-poppers abroad, a simplification of their name in Korean) have remained doggedly present, through thick and thin. The year prior to 2015's Lionheart was not particularly kind to the group, either. Their would-be triumphant return single ‘Mr.Mr.’ suffered a label flub, as it essentially lost the footage to what's said to have been a truly showstopping music video (bearing in mind just how essential visuals are to K-pop), and not long after they lost beloved member Jessica, arguably their de-facto leader alongside Taeyeon.

The latter event in particular created something of a scandal, some fans hurling ire at the group over imagined slights to the booted star, and others taking on the defence, destroying what had been a long-lasting sense of unity for Korea's most legendary girl group. For those not plugged in to the world of K-pop, it must be emphasized: Girls' Generation brought the Korean Wave to the West. Their mega-hit ‘Gee’ is still oft considered the foremost gem in K-pop's crown, and they've sold out tours around the globe in corners often unkind to Asian artists.

So, with Lionheart having handled (however awkwardly transparently) the brunt of the “Can they keep the vibe going post-Jessica?” questions, and whatever other negative sentiments, Holiday Night, then, can simply get back to the Girls defining a generation.

They waste no time. Following the obligatory ‘Girls Are Back’ opener, the album gets right to the one, two punch of both its lead singles at tracks 2 and 3. ‘All Night’ and ‘Holiday’, together forming the album's title, forego any pretense of a build-up, released simultaneously, in a gesture akin to, well, stunting.

Still, the question lingers: what do Girls' Generation have left to prove? What more can they prove? With enough hits to put essentially any other group in their arena to shame, a veritable K-pop masterpiece album in I Got a Boy, the kind of endorsement money to presumably retire five times over, their persistence has begun to feel like a simple gesture of proving capability, underscored by the conscious marketing of the decade benchmark.

Granted, with the industry's love of a good concept (read: ploy), there's no way SM Entertainment would have let the group pass the date unspoken, but for the group themselves, one wonders if it's a drive more akin to a desire to continually show and prove themselves, or simply prolonged existence for longevity's sake.

The music found on Holiday Night is predictably pristine, focused pop flexing, produced into a snug bastion of sound. Inevitably, the familiarity makes it equally safe. Brushing off the omnipresent oddity that this is yet another K-pop album handled far more by European hit makers than Korean producers, it still all feels a bit standard, if assured. A certain overconfidence on SM's part seems to rule here: they pulled out all the stops to help create strong songs for the group's members delving out into solo careers, but when it comes to the unit itself? They're already so established, did they really need to do more than show up on their big day? SM doesn't seem to think so, more focused on giving the actual hits to fresher units such as Red Velvet.

It's somewhat fitting, as – understandably – the group isn't going to have the drive or energy of their younger peers; they've already done it all. Naturally, there's still plenty to be said for the confidence of experience, and the ladies certainly sound comfortable and at home here. One just wishes that rather than simply show up with their best foot forward, that they'd really taken a shot for that top spot again. Instead, they seem happy to merely extend their residency.