"All Star" is a song by the American rock band Smash Mouth from their second studio album, Astro Lounge (1999). Written by Greg Camp and produced by Eric Valentine, the song was released on May 4, 1999, as the first single from Astro Lounge.
"All Star" was one of the last tracks to be written for Astro Lounge, after the band's record label Interscope requested for more songs that could be released as singles. In writing it, Camp drew musical influence from contemporary music by artists like Sugar Ray and Third Eye Blind, and sought out to create an "anthem" for outcasts. In contrast to the more ska punk style of Smash Mouth's debut album Fush Yu Mang (1997), the song features a more radio-friendly style.
The song received generally positive reviews from music critics, who praised its musical progression from Fush Yu Mang as well as its catchy tone. It was nominated for the Best Pop Performance by a Duo or Group with Vocals at the 42nd Grammy Awards.
Subsequent reviews from critics have regarded "All Star" favorably, with some ranking it as one of the best songs of 1999. The song charted around the world, ranking in the top 10 of the charts in Australia, Canada, and on the Billboard Hot 100, while topping the Billboard Adult Top 40 and Mainstream Top 40 charts.
The song's accompanying music video features characters from the superhero film Mystery Men (1999), which itself prominently featured "All Star". The song became ubiquitous in popular culture following multiple appearances in films, most notably in the aforementioned Mystery Men and, later, the DreamWorks Animation film Shrek (2001).
It received renewed popularity in the 2010s as an internet meme and has ranked as one of the most-streamed rock songs from 2017 to 2021 in the United States.