Highly sought after and rarely seen, Sia Furler is like a rare bird.

The Australian native most known for songwriting credits on tracks for powerhouse performers ranging from Beyoncé to Rihanna, has never been a stranger to the spotlight, despite attempts to avoid it.

Her career, most aptly known for this avoidance, is a tale of longevity and strength. With five albums released with only niche followings and countless features, awards and songwriting recognitions under her belt, Sia’s widespread recognition came years later with the release of her smash hit “Chandelier.”

Sia’s juggernaut, “Chandelier” and the following album “1000 Forms of Fear,” catapulted Sia into the limelight. Joining the ranks of some of the top pop artists in the industry, Sia’s ability to weave seemingly simplistic pop tracks into uniquely outstanding successes is unrivaled.

With the release of her sixth album, “This Is Acting,” Sia’s trajectory will only continue. Compiled of tracks previously offered to other artists, “This Is Acting” is pop at its finest. Notably used to escape her record contract and propelled through the success of “Chandelier,” the record plays heavily into the Top 40 sound that brought her forward while maintaining Sia’s otherworldly vocal style.

On tracks like “Move Your Body,” this direction is most easily recognized. Inherently danceable and ultimately striking, “Move Your Body” seems destined for a club remix. Spun through transcendent vocals and powerful synths, the track is sure to engulf its listeners into a world of strobe lights and pounding speakers.

Other songs like lead single “Alive” are equally impressive. Most like “Chandelier,” Sia’s ascending vocals blast through dense instrumentals. Originally written for Adele, the track is both catchy and forceful. More eccentric tracks do exist on “This Is Acting,” however. Some of the most successful ventures on the record include the dance floor-prepped “Cheap Thrills” and the Kanye West co-written “Reaper.” Each maintains the same radio-friendly quality that will appeal to the mainstream.

In tracks “Broken Glass” and “Space Between,” Sia’s hollow vocals play over painstaking and emotive lyrics. Where “This Is Acting” is largely an upbeat record, both of these tracks are welcomed scale backs. Still characteristically focused on Sia’s crackling voice, each track is a ballad worthy of even the most ardent hopeless romantic. On “Broken Glass,” these emotions loop through electronic synths and drums, while “Space Between” is largely left to simple beats and a wicked melody.

While a track like “Alive” has already proven to be a surefire smash, “Unstoppable” seems like the secretive hit that may never be. Bubbling just beneath the surface, buried deep in a highly accomplished album, “Unstoppable” may not be so readily noticed by single-loving audiences. With an undying confidence, the track plays like so many self-empowerment anthems before it, while still being undeniably Sia. Like powerhouses Kelly Clarkson and Demi Lovato, Sia proves, even if avoidant, that she is entirely assertive in her position in the industry.

While no longer hidden, Sia still gleams like the gem she is. Every track off of “This Is Acting” is worthwhile and sure to withstand the test of time. Whether her feelings on each are of fondness or indifference, for the listener and the fan, this compilation is more than fulfilling.