 Complete the following phrase:  To promote Rainbow, Kesha embarked on the Rainbow Tour 20172019, which began on September 26, 2017, in Birmingham, Alabama, and visited North America, Europe, Oceania, and Asia. She furthered promotion by joining a co-headlining concert tour with American rapper Macklemore named The Adventures of Kesha and Macklemore 2018. This tour took place in North America between June 6, 2018 and August 5, 2018. Keshas documentary film, Rainbow: The Film, was released on Apple Music on August 10, 2018. The documentary chronicles her stint in rehab for her eating disorder and the creation of Rainbow. In the same month, Kesha collaborated with British rock band The Struts on the remix of their song Body Talks, released as a single from their album Young  Dangerous 2018. On September 19, 2018, Kesha released her song Here Comes the Change, which served as a single to promote On the Basis of Sex 2018, a biographical film about Ruth Bader Ginsburg. In October 2018, Kesha collaborated, wrote, and performed on the song Safe with her younger brother Sage Sebert and rapper Chika, as an homage for the 