Background and release
Little Mix premiered "Change Your Life" before the release of DNA, performing it live for the first time on Children in Need 2012 on 17 November 2012. The group were set to appear on Google+ on 12 December 2012, but due to technical problems they had to cancel. To keep their fans happy, the artwork and release of "Change Your Life" as the third single from DNA was revealed instead. Little Mix's management posted the information on the group's Facebook, writing, "Sad news Mixers! The girls can't do the Hangout today because of technical problems...BUT they have a little surprise for you instead...the new 'Change Your Life' cover AND they'll be doing a Twitter Q&A at 6pm! Not such sad news after all! Mixers HQ x". Syco solicited the single to radio stations in the United Kingdom on 5 January 2013.
Digital Spy's Lewis Corner awarded "Change Your Life" four out of five stars, commending Little Mix's "pitch-perfect" harmonies and Richard Stannard's ability to create a pop anthem. Dan Stubbs of NME complimented the song's lyrics and deemed the chorus "monumental". Christopher Hooton of Metro called the track "catchy and anthemic". Jon Hornbuckle from So So Gay felt that "Change Your Life" was an obvious single choice and that its anthemic chorus is the definition of girl power in 2013. Adrian Thrills of the Daily Mail positively reviewed the song, "The vocals are unexpectedly potent, with the harmony singing of Perrie, Jesy, Leigh-Anne and Jade blending impressively on the big ballad 'Change Your Life'". Entertainment Wise's Amy Gravelle said that the track succeeds in surpassing generic pop ballads, adding, "Which is surprising, for a band that have gone through the same mental trials and tribulations of other X Factor contestants who have failed at the first album hurdle".
"Change Your Life" debuted at number 116 on the UK Singles Chart on 1 December 2012, due to strong digital downloads following the release of DNA. It re-entered the chart on 2 February 2013 at number 36, selling a total of 9,019 digital copies that week. The song climbed to number 31 the following week before receiving a 140% sales increase following Little Mix's performance of it on BBC One's The Graham Norton Show, climbing 19 places to its peak of number 12 the week after. "Change Your Life" marks Little Mix's fourth consecutive top 20 hit in the United Kingdom. It reached #20 on the Official Vodafone Big Top 40. "Change Your Life" debuted at number 13 on the Irish Singles Chart on 7 February 2013, marking the chart's highest debut for that week. It climbed to its peak of number 12 the following week, before dropping to number 17 the week after. The song spent a total of ten weeks on the chart. In Scotland, "Change Your Life" debuted at number 28 on the Scottish Singles Chart of 2 February 2013. On 23 February 2013, the song peaked at number eight, becoming Little Mix's fourth consecutive top ten single in the country. 
The music video was released on January 31, 2013. It was directed by Dominic O'Riordan and Warren Smith.It features the girls on their DNA Tour, including their backstage antics, being on the road and tour rehearsals. The girls are also in a recording booth, performing the song, while standing in a circle.
Usage in the Media
The song was used for the opening titles of series 2 and 3 of the Australian reality television series, House Rules.