In February 2013, at the 55th Grammy Awards, Rihanna won her sixth Grammy Award, in the category Best Short Form Music Video for "We Found Love" (2011). Also that month, the United Kingdom's Official Charts Company announced that Rihanna had sold 3,868,000 records in the past year in the country, ranking at No. 1 in the list of 2013 BRIT Awards artist nominees. Rihanna's fifth headlining concert tour, the Diamonds World Tour, began in March 2013, in support of "Unapologetic". Rihanna then appeared in the Seth Rogen and Evan Goldberg comedy film "This Is the End", which was released in June 2013. That same month, American hip hop artist Wale released a remixed version of his single "Bad" featuring Rihanna. In October 2013, Eminem released his Rihanna-assisted single, "The Monster", as the fourth release from his eighth studio album "The Marshall Mathers LP 2" (2013).