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| ARIA Charts number-one singles of 2008 | |
|---|---|
| Other Australian number-one charts of 2008 | |
| albums | |
| urban singles | |
| dance singles | |
| club tracks | |
| digital tracks | |
| Top Australian singles and albums of 2008 | |
| Triple J Hottest 100 | |
| top 25 singles | |
| top 25 albums |

The ARIA Singles Chart ranks the best-performing singles in Australia. Its data, published by the Australian Recording Industry Association, is based collectively on each single's weekly physical and digital sales.[2] In 2008, fifteen singles claimed the top spot, including Timbaland's "Apologize", which started its peak position in late 2007. Twelve acts achieved their first number-one single in Australia, either as a lead or featured artist: Leona Lewis, Flo Rida, T-Pain, Colbie Caillat, Gabriella Cilmi, Jordin Sparks, Katy Perry, Kid Rock, Lady Gaga, Colby O'Donis, Kings of Leon and Wes Carr.[3] Five collaborations topped the chart. Lady Gaga earned two number-one singles during the year for "Just Dance" and "Poker Face".
"Poker Face" was the longest running number-one single, having topped the ARIA Singles Chart for six weeks in 2008 and two additional weeks in 2009.[1] Perry's "I Kissed a Girl" topped the chart for six consecutive weeks, while Lewis' "Bleeding Love" and Cilmi's "Sweet About Me" both stayed at number one for five weeks.[4][5][6] Rihanna's "Don't Stop the Music", Sparks' "No Air", Pink's "So What", and Kings of Leon's "Sex on Fire" each spent four weeks at the number-one spot.


| The yellow background indicates the #1 song on ARIA's End of Year Singles Chart of 2008. |
| Date | Song | Artist(s) | Ref. |
|---|---|---|---|
| 7 January | "Apologize" | Timbaland featuring OneRepublic | [7] |
| 14 January | |||
| 21 January | "Bleeding Love" | Leona Lewis | [5] |
| 28 January | |||
| 4 February | |||
| 11 February | |||
| 18 February | "Don't Stop the Music" | Rihanna | [8] |
| 25 February | "Bleeding Love" | Leona Lewis | [5] |
| 3 March | "Don't Stop the Music" | Rihanna | [8] |
| 10 March | |||
| 17 March | |||
| 24 March | "Low" | Flo Rida featuring T-Pain | [9] |
| 31 March | |||
| 7 April | "Bubbly" | Colbie Caillat | [10] |
| 14 April | "Sweet About Me" | Gabriella Cilmi | [6] |
| 21 April | "Low" | Flo Rida featuring T-Pain | [9] |
| 28 April | "4 Minutes" | Madonna featuring Justin Timberlake | [11] |
| 5 May | |||
| 12 May | |||
| 19 May | "Sweet About Me" | Gabriella Cilmi | [6] |
| 26 May | |||
| 2 June | |||
| 9 June | |||
| 16 June | "No Air" | Jordin Sparks and Chris Brown | [12] |
| 23 June | |||
| 30 June | |||
| 7 July | |||
| 14 July | "I Kissed a Girl" | Katy Perry | [4] |
| 21 July | |||
| 28 July | |||
| 4 August | |||
| 11 August | |||
| 18 August | |||
| 25 August | "All Summer Long" | Kid Rock | [13] |
| 1 September | |||
| 8 September | |||
| 15 September | "Just Dance" | Lady Gaga featuring Colby O'Donis | [14] |
| 22 September | "So What" | Pink | [15] |
| 29 September | |||
| 6 October | |||
| 13 October | |||
| 20 October | "Sex on Fire" | Kings of Leon | [16] |
| 27 October | |||
| 3 November | |||
| 10 November | |||
| 17 November | "Poker Face" | Lady Gaga | [1] |
| 24 November | |||
| 1 December | |||
| 8 December | |||
| 15 December | "You" | Wes Carr | [17] |
| 22 December | "Poker Face" | Lady Gaga | [1] |
| 29 December |
| Position | Artist | Weeks at No. 1 |
|---|---|---|
| 1 | Lady Gaga | 7 |
| 2 | Katy Perry | 6 |
| 3 | Leona Lewis | 5 |
| 3 | Gabriella Cilmi | 5 |
| 4 | Rihanna | 4 |
| 4 | Jordin Sparks | 4 |
| 4 | Chris Brown | 4 |
| 4 | Pink | 4 |
| 4 | Kings of Leon | 4 |
| 5 | Flo Rida | 3 |
| 5 | T-Pain (as featuring) | 3 |
| 5 | Madonna | 3 |
| 5 | Justin Timberlake (as featuring) | 3 |
| 5 | Kid Rock | 3 |
| 6 | OneRepublic (as featuring) | 2 |
| 6 | Timbaland | 2 |
| 7 | Colbie Caillat | 1 |
| 7 | Colby O'Donis (as featuring) | 1 |
| 7 | Wes Carr | 1 |