Whether it's Donald Trump appearing at the Republican National Convention with the strains of Queen in the background or Wisconsin Gov. Scott Walker (R) playing the Dropkick Murphys during a campaign stop, politicians have long been using music at their events against the wishes of the artists. On Sunday's Last Week Tonight, John Oliver urged musicians to come together and take a stand against the unauthorized use of their work, and Usher, Michael Bolton, Josh Groban, Sheryl Crow, and others accepted his call to action.