"Stone Cold" is a song co-written and recorded by American singer Demi Lovato for her fifth studio album, Confident (2015). The song was written by Lovato with Laleh Pourkarim, who also served as the song's producer, and Gustaf Thörn. It was released to digital retailers on October 9, 2015 through Hollywood Records and Island Records as the first and only promotional single off the album, one week prior to the album's release. The song was initially premiered on radio via 97.1 FM on February 6, 2016. It was sent to contemporary hit radio on March 21, 2016 as the third and final single from the album. On April 4, the song was sent to hot adult contemporary radio.

A ballad, "Stone Cold" discusses the pain of watching an ex 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. Some critics compared "Stone Cold" to Lovato's 2011 single "Skyscraper" and the work of English singer Adele.

"Stone Cold" is a pop and soul sentimental ballad. It was written by Lovato, Laleh Pourkarim and Gustaf Thörn. According to the digital sheet music published by Kobalt Music Publishing America, Inc., "Stone Cold" was originally composed in the key of F minor with a "moderately fast" tempo of approximately 144 BPM. Lovato showcases a vocal range on the track, alternating between belting the verses and delivering other lines such as "I'm happy for you" softly, and spans from a low note of F₃ to a high note of G#₅. The song features a stripped down production style that focuses primarily on piano and vocals.

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