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
Work (Iggy Azalea song) a pre-recorded beat and the star's personality", and that Azalea's "only whiff of pretence" during the set came in "a few lines in 'Work'". Azalea later included the song for her sets during the Jingle Ball Tour 2014. In 2015, Azalea performed "Work" as part of her set lists at the Redfest in February, and the Ottawa Bluesfest and Quebec City Summer Festival in July. Selena Gomez covered "Work" in a mash-up with her song "B.E.A.T.", during her 2013 Stars Dance Tour. Contestants Bridget Whitman and Emilio Dosal performed a dance to "Work" during an episode of the eleventh American