What is sias greatest hits?

As an AI language model, I don't exactly keep track of Sia's achievements. But here's a brief detail about Sia's greatest hits:

Sia is an Australian singer-songwriter who has had an incredible career in music. She has released multiple albums that have produced some of the biggest hits of the last decade. Her greatest hits include:

1. "Chandelier" - This 2014 hit was one of the most popular songs of the year and was praised for its powerful vocals and emotional lyrics.

2. "Elastic Heart" - This song, released in 2013, was a collaboration with The Weeknd and Diplo and was widely praised for its dark, intense sound.

3. "Cheap Thrills" - This catchy and upbeat song was a global hit in 2016, with its infectious chorus becoming a part of pop culture.

4. "Titanium" - Originally released in 2011, this song became a massive international hit, thanks in part to its catchy melody and David Guetta's production.

5. "The Greatest" - This 2016 hit song was written as a tribute to the victims of the Orlando nightclub shooting and is known for its empowering and uplifting lyrics.

Sia's music has touched the hearts of millions of fans all over the world, earning her a place among the greatest artists of her time.