"I Begin to Wonder" was originally performed by German dance music producer Jean-Claude Ades. Minogue's record label, London Records, played the song for her and she thought that it "could definitely be a pop hit". She approached Ades and asked him if he would be willing to transform "I Begin to Wonder" from a club song to a pop song. Together they added additional lyrics and rearranged its instrumentation.^[4] Minogue considers the track to be her "signature tune" and is one of her favourite songs to perform live.^[3]

In a review for Musicomh.com, Alexis Kirke described it a "simple but energetic" song with a "striding electro-bass line and some heavy vocal effects".^[5] Cristín Leach of RTÉ Entertainment called "I Begin to Wonder" one of the best songs on Neon Nights.^[6] MSN Entertainment called the track a "decent slice of sparkly radio pop with big synths and 'sexy' vocals".^[7]

"Begin to Spin Me Round" edit

Simultaneously with the release of the original single, an alternative version of "I Begin to Wonder" was released, entitled "Begin to Spin Me Round", a mashup with the 1984 hit "You Spin Me Round (Like a Record)" by Dead or Alive, and especially with the "Murder Mix" of the latter.^[8] This version helped expand the single's success to other European countries, such as Germany.^[9]

The music video was directed by Phil Griffin and filmed in late 2002.^[1] The video opens with a scene of Minogue walking down a futuristic hallway covered in photographs used to promote Neon Nights. She is then shown sitting and dancing in a blue room with the song's title swirling around her in numerous languages. The video concludes with scenes of Minogue crouching in a ventilation shaft and cutting her hair.

The music video was released commercially on various enhanced CD single formats. It was also included on The Hits & Beyond special edition companion DVD (2006) and Dannii Minogue: The Video Collection (2007).

"I Begin to Wonder" was released in the United Kingdom on 3 March 2003 as two CD singles and a cassette single.^[10][11] The song debuted on the UK Singles Chart on 15 March 2003 at number two.^[12] The following week, "I Begin to Wonder" fell to number seven and exited the chart in its eleventh week of release.^[12] The track became Minogue's sixth Upfront Club Chart number one in the UK.^[1] It has sold over 113,000 copies in the UK as of March 2016.^[13] In Ireland, the track reached number 22 on the singles chart^[14] and number seven on the Irish Dance Chart^[15] The song was also successful in Europe. It reached the top ten in France^[16] and the top fifty in Belgium,^[17] the Netherlands,^[18] Sweden^[19] and Switzerland.^[20]

In Australia, "I Begin to Wonder" debuted at number fourteen on 6 April 2003.^[21] It was certified gold by the Australian Recording Industry Association in 2003.^[2] On the ARIA end of year chart for 2003, the track charted at number eight on the Dance Singles chart^[22] and at number sixteen on the Top Australian Singles chart.^[23] In the United States, the song reached number fourteen on the Billboard Hot Dance Singles Sales chart,^[24] and peaked at number two on Billboard’s Dance/Mix Show Airplay Chart.

The following people contributed to "I Begin to Wonder":^[25]

• Dannii Minogue – lead vocals
• Jean-Claude Ades – production, mixing
• Ian Masterson – additional vocal production
• Matthew Donaldson – photography