| Week beginning | Song | Artist |
| 2 January | "The Prayer" | Anthony Callea |
| 9 January |
| 16 January |
| 23 January | "Nasty Girl" | Nitty |
| 30 January |
| 6 February | "Over and Over" | Nelly featuring Tim McGraw |
| 13 February |
| 20 February |
| 27 February |
| 6 March |
| 13 March | "Almost Here" | Brian McFadden and Delta Goodrem |
| 20 March | "Rain"/"Bridge over Troubled Water" | Anthony Callea |
| 27 March |
| 3 April | "Beautiful Soul" | Jesse McCartney |
| 10 April |
| 17 April |
| 24 April |
| 1 May | "Signs" | Snoop Dogg featuring Justin Timberlake and Charlie Wilson |
| 8 May |
| 15 May | "Switch" | Will Smith |
| 22 May | "Don't Phunk with My Heart" | The Black Eyed Peas |
| 29 May | "Hollaback Girl" | Gwen Stefani |
| 5 June | "Don't Phunk with My Heart" | Black Eyed Peas |
| 12 June |
| 19 June | "Incomplete" | Backstreet Boys |
| 26 June | "We Belong Together" | Mariah Carey |
| 3 July |
| 10 July | "Lonely" | Akon |
| 17 July |
| 24 July | "Axel F" | Crazy Frog |
| 31 July |
| 7 August |
| 14 August | "Lonely" | Akon |
| 21 August | "Ghetto Gospel" | 2Pac featuring Elton John |
| 28 August | "Don't Cha" | The Pussycat Dolls featuring Busta Rhymes |
| 4 September |
| 11 September |
| 18 September |
| 25 September |
| 2 October | "Shine" | Shannon Noll |
| 9 October | "Don't Cha" | Pussycat Dolls featuring Busta Rhymes |
| 16 October |
| 23 October | "Gold Digger" | Kanye West featuring Jamie Foxx |
| 30 October |
| 6 November |
| 13 November | "Hung Up" | Madonna |
| 20 November | "My Humps" | The Black Eyed Peas |
| 27 November |
| 4 December | "Maybe Tonight" | Kate DeAraugo |
| 11 December |
| 18 December | "Wasabi"/"Eye of the Tiger" | Lee Harding |
| 25 December |
