"Why Can't We Be Friends?" is a song by the band War. The song has a simple structure, with the phrase "Why can't we be friends?" being sung four times after each two-line verse, totaling to over forty times in under four minutes. It was played in space when NASA beamed it to the linking of Soviet cosmonauts and U.S. astronauts in 1975 for the Apollo–Soyuz Test Project. "Why Can't We Be Friends?" charted at number six in 1975. Billboard ranked it as the No. 23 song for 1975. The song is played in "The Homer They Fall" as Homer Simpson's theme song at the boxing ring.