"Jar of Hearts" is the debut single by American singer Christina Perri. The song was released onto iTunes July 27, 2010, a week after its debut on So You Think You Can Dance. The song was included on Perri's debut EP, The Ocean Way Sessions, and appeared on Perri's debut studio album, Lovestrong (2011). The song was co-written by Perri, Drew Lawrence, and Barrett Yeretsian. Perri drew inspiration for the song from a real-life experience with a love interest who wanted to rekindle a broken relationship. After its debut, the song was released onto iTunes where it later rose to the Top 20 spot in one week.

Perri was unsigned at the time of the song release, which created a lot of discussion between critics who favored the song. The song charted on multiple charts in both the United States and Canada at numbers 17 and 21 respectively. The song sold a total of 47,500 downloads in its opening week. In 2011, it was released in the UK and peaked at number 4 on the UK Singles Chart. It spent 31 weeks in the Top 40 and 48 weeks in the Top 75. It was later certified Platinum after shipping 600,000 copies. It was the 11th best selling single of 2011 in the UK.

After teaching herself to play six chords on the guitar, Perri wrote "The Perfect Man" about the same person about whom "Jar of Hearts" was written. "Jar of Hearts" premiered on So You Think You Can Dance in June, before Perri even had a record deal. Perri's best friend, Keltie Colleen (a Rockette), passed it on to one of the show's choreographers, Stacey Tookey, who later choreographed a contemporary dance routine for All-Star Kathryn McCormick and contestant Billy Bell.

Perri wrote the song in December 2009, only to begin working with her production and management team in February 2010. While recording for an EP, "Jar of Hearts" was additionally going to be recorded with a full band; however, Perri later decided against it stating that "I imagined people dancing to it. It was all a big 'just in case.'"

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