FILE – In this July 13, 2013, file photo, Rapper Mac Miller performs on his Space Migration Tour at Festival Pier in Philadelphia. Ariana Grande has posted a tribute to her ex-boyfriend Mac Miller a week after his death, saying she’s sorry she couldn’t save him. Paramedics declared the 26-year-old Miller dead in his Los Angeles home Sept. 7. (Photo by Owen Sweeney/Invision/AP, File)