Chandelier is the first song of a trilogy. Released on 17 March 2014. The song peaked at number 8 on the Billboard Hot 100. Chandelier was commercially successful.
Then, Elastic Heart is the second one. It was released on 9 January 2015. The song debuted at number 17 on the Billboard Hot 100.
And lastly, Big Girls Cry is the last song of a trilogy. The music video was released yesterday.