The 5th Dimension were an American group formed in Los Angeles. The group were originally called The Versatiles but changed their name in 1966 to The 5th Dimension. The group’s members included Billy Davis Jr and Marilyn McCoo who also had a successful career as duet. The 5th Dimension saw 29 Hot 100 hits in the US including 2 number 1’s in the form of ‘Aquarius/Let The Sunshine In’ and ‘Wedding Bell Blues’. The former of these 2 chart toppers, which were songs from the musical ‘Hair’, would be their only SA chart entry.