"Why Can't We Be Friends?" is a song by the funk band War for their 1975 studio album of the same name. The song has a simple structure, with the phrase "Why can't we be friends?" being sung four times after each two-line verse amounting to over forty times in under four minutes. The song reached #6 on the Billboard Hot 100 in the summer of 1975. The song is unique as various members of the band exchange vocal duties from verse to verse. It was played in outer space when NASA beamed it to the linking of Soviet cosmonauts and U.S. astronauts for the Apollo–Soyuz Test Project.Billboard ranked it as the No. 23 song of that year.