“1+1″ is a song recorded by American recording artist Beyoncé Knowles for her fourth studio album, 4, to be released on June 28, 2011. The song was written by Beyoncé Knowles, The-Dream, Tricky Stewart, and Corey Jackson Carter, produced by The-Dream. Knowles performed “1+1″, live on May 25, 2011 on the American Idol finale. “1+1″ was only released to US iTunes Store as a promotional single on May 25, 2011 through Columbia Records. “Run the World (Girls)”, was released on April 21, 2011 as the album’s lead single.