"Ain't Back Yet" is a song written by Craig Wiseman and Chris Tompkins, and recorded by American country music artist Kenny Chesney. The song is included on a re-issue of Chesney's Greatest Hits II. The song is also played during the end credits to Chesney's 2010 film Summer in 3D.

Critical response to the song was mixed. Matt Bjorke of Roughstock said that the song "isn't the Buffett-like country tune" but that it "fits Kenny Chesney like a glove" as it details quite a bit about what his life has been like since he became that touring musician. Juli Thanki of Engine 145 gave it a thumbs down, saying that it "sounds like a second rate Jason Aldean song" with an "average vocal performance and bland lyric."

The music video was directed by Shaun Silva. It features Chesney performing in concert and shows home videos from his past tours.

On the Billboard Hot Country Songs charts for the week of February 27, 2010, the song debuted at number 23, and reached a peak of number 3 in May 2010. On the Canadian Hot 100 charts for the week of April 3, 2010, the song debuted at number 88.

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