“1-2-3” is a 1965 song recorded by American blue-eyed soul singer Len Barry, who co-wrote the song with John Medora and David White. The recording's chorus and accompaniment were arranged by Jimmy Wisner. “1-2-3” reached number two in the US Billboard chart and number three on the UK Singles Chart. “1-2-3” also went to number 11 on the Billboard R&B chart. It sold over one and three quarter million copies, and was awarded a gold disc.  (More from Wikipedia)