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
Number One Enemy or just plain out-of-the-ordinary objects and surroundings. The song was re-recorded in Simlish for the video game, "". Nick Levine of "Digital Spy" gave the song a positive review. Following its release on 1 March 2010, "Number One Enemy" debuted in the UK Singles Chart on 7 March 2010, where it peaked at #13. The following week, the single fell 6 places to #19. On 21 March 2010, the single fell a further 8 places to #27 and the following week fell a further 7 places to #34, meaning the single has spent 4 weeks in the UK Top 40