In January, Miley released "Flowers," a breakup song reportedly about her ex Liam Hemsworth. It swiftly climbed the charts and became the biggest hit of her music career. The track also served as the lead single for her most recent album Endless Summer Vacation. She revealed recently that "Used to Be Young" was written years ago during early sessions for the album.

"These lyrics were written almost 2 years ago at the beginning of my ESV. It was at a time I felt misunderstood. I have spent the last 18 months painting a sonic picture of my perspective to share with you," she wrote. "The time has arrived to release a song that I could perfect forever. Although my work is done, this song will continue to write itself everyday. The fact it remains unfinished is a part of its beauty. That is my life at this moment ….. unfinished yet complete."