 On May 10, he performed a special concert at the Royal Farms Arena in Baltimore called "Rally 4 Peace," that featured a special appearance by Baltimore State's Attorney Marilyn Mosby, and one set performed by Prince alone at a keyboard.Prince's penultimate album, "Hit n Run Phase One", was first made available on September 7, 2015, on the music streaming service Tidal before being released on CD and for download on September 14.His final album, "Hit n Run Phase Two", was meant as a continuation of this, and was released on Tidal for streaming and download on December 12, 2015.