"Light It Up" is a song by American electronic music producing group Major Lazer, featuring vocals from Jamaican singer Nyla, which appears on Major Lazer's third studio album Peace Is the Mission. A remixed dancehall version of the song, to which additional vocals from British-Ghanaian Afrobeats artist Fuse ODG were added, was included on a re-released version of Peace Is the Mission and released as the album's third single overall on November 5, 2015.

Major Lazer is a Jamaican-American electronic dance music and DJ trio, which includes record producer Diplo, and DJs Walshy Fire and Ape Drums. They originate from Kingston, Jamaica, founded in 2008 by Diplo and Switch, with Switch leaving after three years in 2011. He was then replaced by both Jillionaire and Walshy Fire. In June 2019, Jillionaire left the group and was replaced by Ape Drums. Its music spans numerous genres, mixing reggae with dancehall, reggaeton, soca, house and moombahton.