"Juice" is a song recorded by American singer and rapper Lizzo. It was released on January 4, 2019, by Atlantic Records as the lead single from her third and debut major-label studio album, Cuz I Love You. The single was written by Lizzo, Theron Thomas, Sam Sumser, Sean Small and Ricky Reed; the latter also handled the song's production. Musically, it is a retro-inspired funk and funk-pop song that is based on a throwback groove. Lyrically, the song discusses self-love, and has been described as a self-esteem anthem.

The song received widespread acclaim from critics, some of whom referred to the song as Lizzo's best. Commercially, the single entered component R&B charts in the United States, while also reaching the top twenty in Scotland. The track is certified Double Platinum in the US and Gold or Platinum in five additional countries. A music video was released alongside the single, which contains several 1980s pop culture references. To promote the single, Lizzo performed the song on several shows, including The Ellen DeGeneres Show, The Today Show, Jimmy Kimmel Live! and The Tonight Show Starring Jimmy Fallon.

The song is one of the tracks on the American version of Now That's What I Call Music! 71, released on August 2, 2019. In September 2019, the song spawned an internet meme after Polygon writer Jeff Ramos cut a trailer for House House's Untitled Goose Game using the song as its anthem. It was covered by Beth Ditto on the country music drama series Monarch.