Victoria-Summer Published October 23, 2013 at 600 × 927 in Kelly Osbourne, Jason Priestley, Slash Attend MAC Cosmetics and Rick Baker’s Monster Mash GLENDALE, CA – OCTOBER 19: A guest attends MAC Cosmetics and Rick Baker’s Monster Mash on October 19, 2013 in Glendale, California. (Photo by Charley Gallay/Getty Images for MAC Cosmetics)