On October 2, MTV aired the documentary "", that chronicled the recording of her fourth studio album "Bangerz", which was released on October 4. The album was a commercial success, debuting at number one on the "Billboard" 200 with first week sales of 270,000 copies. On October 5, Cyrus hosted "Saturday Night Live" for the second time. On November 5, Cyrus featured on rapper Future's "Real and True" with Mr. Hudson; an accompanying music video premiered five days later on November 10, 2013. In late 2013 she was declared Artist of the Year by MTV. On January 29, 2014, she played an acoustic concert show on "MTV Unplugged", performing songs from "Bangerz" featuring a guest appearance by Madonna. It became the highest-rated "MTV Unplugged" in the past decade, with over 1.7million streams. Cyrus was also featured in the Marc Jacobs Spring 2014 campaign along with Natalie Westling and Esmerelda Seay Reynolds. She launched her controversial Bangerz Tour (2014) that year, which was positively received by critics. Two months into her tour, Cyrus's Alaskan Klee Kai was found mauled to death at her home after fighting with a coyote. The trauma from the incident inspired her to dedicate her life to veganism. Two weeks later, Cyrus suffered an allergic reaction to the antibiotic cephalexin, prescribed to treat a sinus infection, resulting in her hospitalization in Kansas City. Though she rescheduled some of her US tour dates, she resumed the tour two weeks later, beginning with the European leg.