"Change Your Life" is a song recorded by Australian rapper Iggy Azalea for her debut studio album, The New Classic (2014). It features guest vocals by American rapper T.I.. Initially a demo by Indian-American songwriter Raja Kumari, the song's final composition was co-written by Azalea, Natalie Sims, Kumari, the song's producers The Messengers, Lovy Longomba and T.I.. It is a mid-tempo dub-step, hip hop and synthpop song inspired by Azalea's personal dating experiences, and comprises bass-driven and synth-heavy production. Described by Azalea as "a kind of rap duet", it features her singing on a track for the first time which she took upon to showcase growth and versatility from her previous material.

The song was released as the album's third single on 12 September 2013. A six-track extended play (EP) also titled Change Your Life was made available to coincide with the single's release. The song was well received by most music critics who complimented Azalea's delivery and the track's lyrics. Commercially, "Change Your Life" became Azalea's first top 10 hit on the UK Singles Chart. In the United States, it failed to enter the main Billboard Hot 100 chart, but reached number 22 on Bubbling Under Hot 100 Singles and was certified gold by the Recording Industry Association of America (RIAA). The song also reached the top 40 in Ireland and New Zealand, and peaked at number 44 in Australia.

An accompanying music video was directed by Jonas & François; it premiered on 8 September 2013. Based on the 1995 film Showgirls, it features Azalea playing the film's character, Nomi (Elizabeth Berkley), with T.I. as her boss. The video which also pays homage to the films Blade Runner (1982) and Casino (1995), received acclaim from critics who praised its styling and cinematography. Azalea promoted the single with live performances on 106 & Park, Alan Carr: Chatty Man, The Late Show with David Letterman and at the 2013 MOBO Awards. It was also included in the set list for her 2014 The New Classic Tour, and featured on the soundtrack for the 2015 film Pitch Perfect 2.

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