"Masterpiece" is a song recorded by British recording artist Jessie J for her third studio album, Sweet Talker (2014). The song was written and produced by Josh Alexander and was co-written by Britt Burton and Emily Warren, the latter of whom also co-wrote the album's opening track "Ain't Been Done". "Masterpiece" was released to iTunes on 7 October 2014, alongside "Ain't Been Done", as the second and third promotional singles off Sweet Talker, respectively. It was released to US radio January 13, 2015 as the third international single and fourth from the album overall, while its music video premiered December 10, 2014.

It received generally positive reviews from contemporary music critics, who applauded the song's anthemic nature but others criticized it for being too generic. Even before being promoted as an official single, "Masterpiece" entered the Billboard Canadian Hot 100 at number 82 for the week of October 25, 2014. It later charted in European territories following its official release.

"Masterpiece" is a pop song about self-empowerment and living up to one's potential. Its instrumentation incorporates piano, synthesized beats, and a string section. Critics have noted the song's thematic similarity to her debut album, Who You Are, in that it is "addressed to her haters".

The song has received mixed to positive reviews. Lewis Corner at Digital Spy declared the song "ballsy", but was critical of its cliched lyrics. "It's a trap Jessie falls into a few times on the record," writes Lewis, "either diluting a song's impact with hackneyed lyrics or trilling beyond reason." Mike Wass of Idolator cited "Masterpiece" as a highlight of the album, noting that Jessie J "gets it just right" and that it is "a genuinely good pop song". Ken Capobianco of The Boston Globe found "Masterpiece" to be demonstrative of what he called Jessie J's "disconcerting tendency to over-emote". Caroline Sullivan of The Guardian compared "Masterpiece" to the music of American singer-songwriter Pink for being "heavy with pop-rock melodrama and strength-from-within ruminating". In his review of Sweet Talker, Dave Hanratty of Drowned in Sound condemned "Masterpiece" for being overly generic, but was moderately receptive of the production and Jessie J's vocals.Time named the track as the third worst song of 2014, commenting that "a song about how one's undaunted by mistakes in the public eye seems delusional when sung by someone with no persona to speak of".

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