"Check on It" is a song recorded by American singer Beyoncé, featuring American rappers Bun B and Slim Thug. It was composed by Beyoncé, Swizz Beatz, Sean Garrett, Angela Beyincé, and Slim Thug. Initially recorded by Beyoncé only, the song was supposed to be featured on the soundtrack for 2006 film The Pink Panther, in which she co-stars as Xania. As it was ultimately not included on its soundtrack album, the song with additional vocals from Slim Thug was placed on the 2005 Destiny's Child's greatest hits album #1's. Columbia Records released "Check on It" in the United States on December 13, 2005. The official single version of the song includes vocals from American rapper Bun B.
The song's development was motivated by the phrase "Check on It" which Beyoncé and her management jokingly used before they decided to turn it into a song. "Check on It" is an R&B and hip hop song, which is instrumentally complete with a heavy bassline, strings, and wind instrument. Lyrically, it takes place in a club, where Beyoncé is letting the male patrons know that they are welcome to come and look at her body when she is dancing. The song consists of two verse-raps by Slim Thug. "Check on It" was well received by contemporary music critics, who universally complimented Beyoncé's vocals, and the assertiveness with which she sings her lines.
"Check on It" was not originally intended as a single from the album #1's. However, it received heavy rotation on US radio stations, following the release of the first single, "Stand Up for Love" (2005), which performed poorly on the charts. Eventually, "Check on It" debuted on the US Billboard Hot 100 in November 2005, before its official release date. The single peaked at number one for five consecutive weeks, becoming one of the two longest-running number-one single in 2006, and Beyoncé's third US number-one single as a solo artist. "Check on It" reached number one in New Zealand and the top ten on various singles chart in mainland Europe.
The music video for the song was directed by Hype Williams, and premiered on December 16, 2005 on MTV. The version of "Check on It" used in the clip features a remix of "The Pink Panther Theme" and a verse-rap from American rapper Bun B. Incorporating 1950s influences, the video was shot in pink to brand the relationship with The Pink Panther. It won the Best R&B Video at the 2006 MTV Video Music Awards, and was nominated for Video of the Year at the 2006 BET Awards. Although Beyoncé did not perform "Check on It" in any televised appearances, it was a part of her set list on The Beyoncé Experience (2007) and the I Am... World Tour (2009–10).