The show will feature musical performances from singer-songwriter Demi Lovato and American pop rock band Huey Lewis & the News. Lovato's new single, "Heart Attack," off her upcoming untitled fourth album, has achieved Gold status in the U.S. and debuted at #1 on the iTunes chart in 18 countries. Huey and the boys, who had a string of hits in the 1980s, will perform their single, "The Heart of Rock & Roll," accompanied by the "Dancing with the Stars" troupe. And "Macy's Stars of Dance" is back for its first installment of the season. Choreographed by Nick Florez and RJ Durell, the performance will feature spectacular mind-blowing stunts and eight of the hottest dancers working in the industry. Also on the results show, the male Pro and Troupe dancers perform a special routine.