"What You've Done to Me" was written by David Musumeci, Anthony Egizii, Tania Doko and Jörgen Elofsson. It was produced by Musumeci and Egizii under their stage name DNA Songs. After winning The X Factor, "What You've Done to Me" was released for digital download on 20 November 2012, as Jade's winner's single. The song was released physically on 26 November 2012.
For the week spanning from 16 December 2012 to 22 December 2012, "What You've Done to Me" debuted and peaked at number 28 on the South Korea Gaon International Download Chart. This position on the download chart corresponded to Jade's debut on the South Korea Gaon International Digital Chart at number 40.It was nominated for "Song of the Year" at the 27th ARIA Music Awards.
Jade performed "What You've Done to Me" live for the first time during The X Factor grand final performance show on 19 November 2012. After her performance, Jade's mentor Guy Sebastian called the song a "radio smash". Jade performed the song again during the grand final decider show the following day, after she was announced as the winner.