Confident (album) move on and be happy with someone else. The song incorporates pop and soul influences, and is centered on a piano melody, with a stripped down production aimed at highlighting Lovato's vocals. "Stone Cold" received comparisons to Lovato's 2011 song "Skyscraper" and the work of English singer Adele. The album follow with the trap-inspired song "Kingdom Come" it features vocal appearance by rapper Iggy Azalea. Several critics noted that the song is comparable to Azelea's "Black Widow" (2014) featuring Rita Ora. "Waitin for You" featuring vocals by singer Sirah, musically, it's an R&B and hip hop song that starts with
Black Widow (Iggy Azalea song) inspired by 70s kung fu films and Tarantino movies. The video starts with Rita Ora and her boyfriend, played by Michael Madsen, entering a diner. The man steps on and squishes a spider with his boot, just before Iggy Azalea is shown as a waitress named Fox behind the diner counter. Azalea then approaches the couple and hands them the menu. The man orders a BLT sandwich "dripping with melted cheese" and just when Ora is about to order he interrupts her by saying "she's gonna have the same damn thing", which causes Ora to look at him somewhat upset.