"Light Me Up" is a song written and recorded by American country music artist Hunter Hayes. Co-written by busbee and Shane McAnally, it was originally recorded for Hayes's self-titled debut studio album (2011) but was only included on the 2013 Encore edition re-issue. The song was re-recorded in 2015, and was released to the UK and Oceania on March 13, 2015 as the lead single for Hayes's international compilation album, I Want Crazy (2015).

"Light Me Up" was written by Hayes with pop songwriter busbee and country music singer Shane McAnally as an upbeat country pop song about the excitement of love. Beginning with a drum loop and B-3, its instrumentation later incorporates guitar, banjo, and bouzouki. Bob Paxman at Country Weekly described the chorus, which features firework and sunshine imagery, as "uplifting".

The UK single version downplays the country elements of the original for a more pop-oriented sound. Drawing influences from electropop and dance-pop, the remix features a more heavily-processed vocal and synthesized backbeat.

Conceived during the writing sessions for Hayes's self-titled debut studio album, "Light Me Up" was originally recorded sometime in 2011 but was ultimately not included on the original release of the album due to not fitting the tone of the album at the time. In 2012, the song was re-recorded and offered to fans for free through Hayes' official Facebook page as part of a partnership with Country Financial. After the success of "Wanted" and the inspiration he received during his Most Wanted Tour, Hayes began working on new material. It was mutually decided by Hayes and his label in late 2012 that it "[wasn't] necessarily the right time... to make a new record," so the Encore edition of the album was developed as an alternative to make the newly-written songs and a handful of re-recorded tracks (including a new version of "Light Me Up") available to the fans. In 2015, the song was partially re-recorded for a fourth time and given a pop mix for an exclusive UK single release.

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