"Supergirl" is a pop song by American recording artist and actress Miley Cyrus, performing as Hannah Montana – the alter ego of Miley Stewart – a character she played on the Disney Channel television series Hannah Montana. The song was written by Kara DioGuardi, in collaboration with Daniel James, and produced by Dreamlab. "Supergirl" was released on August 28, 2009, by Walt Disney Records as the lead and only single from the series' third soundtrack, Hannah Montana 3. A karaoke version is available in Disney's Karaoke Series: Hannah Montana 3. The song is characterized by dance-pop elements in its musical composition and contains lyrics regarding the lows of pop stardom.

The song received average to mixed reception from contemporary critics and garnered average commercial outcomes for Cyrus in several countries, compared to those of her previous efforts as Montana. In the United States, it peaked at number five on Billboard's Bubbling Under Hot 100 Singles (Hot 100–105). It marked Cyrus' first entry as Montana in Austria; it peaked at number fifty-eight on the Austrian Singles Chart. A music video for "Supergirl" was released, taken from footage of a concert performance.

"Supergirl" was co-written by Kara DioGuardi, who composed a total of four songs on Hannah Montana 3, and Dan James. A karaoke version is available in Disney's Karaoke Series: Hannah Montana 3. "Supergirl" leaked into the Internet in November 2008, along with six other songs from Hannah Montana 3. The song first premiered on Radio Disney on July 2, 2009, in order to promote the soundtrack and was afterward released as the lead and only single from Hannah Montana 3 on August 28, 2009.

...
Wikipedia