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
My Number One but it is the first time it has become accessible to players from all over Europe. It is also the first time that a song from a Greek singer is included in the "Singstar" game. In early 2006, it was announced that "My Number One" and "Mambo!" would be remixed and released in the United States by Moda Records. On August 22, a maxi CD single was released to record stores, featuring 10 remixes, and the original song; the mixes were also released as digital downloads on June 4. The song peaked on the Billboard Hot Dance Club Play chart