On September 4, 2015, Kilcher joined with Natasha Bedingfield, Sean Paul, Paul McCartney, Fergie, Colbie Caillat, Krewella, Angelique Kidjo, Christina Grimmie, Kelsea Ballerini, Victoria Justice, Nicole Scherzinger, Sheryl Crow and Toby Gad for the environmentally-themed "Love Song to the Earth." The song aims at raising awareness of climate change, with all proceeds benefiting Friends of the Earth U.S. and the UN Foundation. Kilcher and several Love Song Singers performed in Washington, DC ahead of Pope Francis' address to the U.S. Congress.