As with Miley and Ray Cyrus's last duet, "Ready, Set, Don't Go" (2007), "Butterfly Fly Away" describes a child's transition to adulthood.
[2] The song was written and produced by Glen Ballard and Alan Silvestri for the 2009 film Hannah Montana: The Movie.
[2] This comment became a recurring motif in the film and provided the basis for the lyrics to "Butterfly Fly Away", which use a caterpillar's metamorphosis as a metaphor for a child's coming of age.
Warren Truit of About.com found it "sentimental"[7] while Scott Mervis of the Pittsburgh Post-Gazette called it "a sweet duet".
[8] Stephen Thomas Erlewine, also of Allmusic, was more negative, calling it a "syrupy, icky" song on which Billy Ray never sounds quite right.
[9] Leah Greenblatt of Entertainment Weekly wrote, "[Miley's] delicate duet with dad Billy Ray, 'Butterfly Fly Away,' is quietly lovely.
"[10] Billboard reviewer Ken Tucker stated that it "is an airy and flowing song about family on which father and daughter's voices blend nicely".
[21] They also performed the song in London in an Apple Store, along with a duet version of Billy Ray's "Thrillbilly" and several of their own singles.