Background: Kerli Koiv was born in Elva on February 7, 1987. Her mother, Piret Koiv, was a social worker, and her father, Toivo Koiv, was an auto mechanic. Her parents separated when she was 16. Kerli has stated that when she wrote "Supergirl"--a song about domestic violence written for Utopia--she "put [herself] in [her] mother's body, and said things that [she] wished that [her mother] would've said to her dad when [she] was little".
Context: On 5 November 2015, it was revealed that Kerli composed a song for Eesti Laul 2016, Estonia's national selection for the Eurovision Song Contest 2016. In 2015, Kerli left Los Angeles and returned to Estonia, where she spent nine months with no running water and only her music-making gear to keep her company, where she produced her first independent album.  Her single "Feral Hearts" was released digitally worldwide on 19 February 2016. The music video for "Feral Hearts" was released the following week on February 25. "Blossom", the second single from her second studio album, followed with a video on 28 April and the song's release on iTunes the next day.  On 26 June, Kerli released the song "Racing Time". She explained that it was one of three songs written for the 2016 film Alice Through the Looking Glass. She had previously contributed to the Almost Alice concept album for the 2010 film Alice in Wonderland. However, the songs were not included on the latest movie's soundtrack. On 27 July, she released the third single from her upcoming sophomore studio album, "Diamond Hard", along with its music video.  On April 22, 2016, Kerli was featured as a vocalist and co-wrote a song on British artist Katy B's 'Honey' album (Rinse/Virgin EMI). She co-wrote and sang the hook on "I Wanna Be."  On 8 November 2016, it was revealed that Kerli would compete in Eesti Laul 2017, with the song "Spirit Animal". She reached the final and finished second in the competition. She was later announced to be representing Estonia in the OGAE Second Chance Contest 2017 with "Spirit Animal", held in Warsaw. On 24 April 2017, Kerli and Illenium released their collaboration song "Sound of Walking Away", included in Illenium's second studio album Awake (2017).
Question: What else did she do during this time?

Answer:
Her single "Feral Hearts" was released digitally worldwide on 19 February 2016.