"Get Back" is a song performed by American singer Demi Lovato. It was written by Lovato, Joe Jonas, Nick Jonas and Kevin Jonas and produced by the Jonas Brothers alongside John Fields, for Lovato's debut studio album, Don't Forget. The song features Jack Lawless on drums and John Taylor and the Jonas Brothers on guitars. The initial writing of the song took place when Lovato wanted to write a song about getting back together with an old boyfriend, as opposed to writing mean or heartbroken songs. "Get Back" was released as the album's lead single on August 12, 2008, by Hollywood Records. Musically, the song is an upbeat rock song with a guitar-driven sound.

The song was met with positive reviews from critics and performed average commercially, peaking at number forty-three on the Billboard Hot 100 and ninety-three on the Canadian Hot 100. In Australia, the song peaked at number ten on the ARIA Hitseekers chart. Lovato has performed the song on several occasions, including Good Morning America and The Ellen DeGeneres Show.

"Get Back" was written by Lovato, Joe Jonas, Nick Jonas and Kevin Jonas, and produced by the Jonas Brothers alongside John Fields. Lovato wanted to write a song about getting back together with someone, as she believed enough mean and heartbroken songs had already been made. She said, "It's kind of a fun, upbeat song and it's kind of just fun to sing to the person that I wrote it about." The Jonas Brothers provided backing vocals and guitars on the track. In addition to co-producing the song, Fields also provided bass, guitars and keyboards.Jack Lawless played the drums, and John Taylor contributed backing vocals and played the guitar. The song was released as the lead single for Don't Forget on August 12, 2008, in the United States and Canada via digital download. The edited Radio Disney version was released on the same day.

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