"Supergirl" was released in 2009, by Walt Disney Records as the lead single from the series' third soundtrack, Hannah Montana 3.

It marked Cyrus' first entry as Montana in Austria; it peaked at number fifty-eight on the Austrian Singles Chart.

"Supergirl" was co-written by Kara DioGuardi, who composed a total of four songs on Hannah Montana 3, and Dan James.

[3] The song first premiered on Radio Disney on July 2, 2009, in order to promote the soundtrack and was afterward released as the second and final single from Hannah Montana 3 in 2009.

"[11] Warren Truitt of About.com agreed but stated, "[The song] may be a little cookie-cutter, but at least the songwriters realize who their audience is and they deliver the goods".

The performance begins with Cyrus sitting in a bench, facing a mirror, as backup dancers apply makeup on her and attend her.

[8] The performance was later premiered as the song's music video on July 2, 2009, on Disney Channel to promote Hannah Montana 3.