Mambo No. 5 the song debuted at number one on the UK Singles Chart, becoming Bob the Builder's second number-one single there after "Can We Fix It?". The song experienced major success in Australia and Ireland. In the former country, the song debuted at number three on the ARIA Singles Chart on 4 November 2001 and reached number two on 18 November, held off the top spot by Alien Ant Farm's cover of "Smooth Criminal". After staying at number two for another week, the song began to leave the chart, spending nine more weeks in the top 50. In Ireland, the song first
Lists of UK Singles Chart number ones Lists of UK Singles Chart number ones The UK Singles Chart is a weekly record chart which for most of its history was based on single sales from Sunday to Saturday in the United Kingdom. Since July 2014 it has also incorporated streaming data, and from 10 July 2015 has been based on a Friday to Thursday week. , 1319 singles have reached number one. The chart was founded in 1952 by Percy Dickins of "New Musical Express" ("NME"), who telephoned 20 record stores to ask what their top 10 highest-selling singles were. Dickins aggregated the results into a top