# List of number-one singles of 2009 (Australia)

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. In 2009, 14 singles claimed the top spot, including Lady Gaga's "Poker Face", which started its peak position in late 2008. Seven acts achieved their first number-one single in Australia, either as a lead or featured artist: Jessica Mauboy, The Fray, Taylor Swift, A. R. Rahman, Nicole Scherzinger, David Guetta, Vanessa Amorosi and Kesha.
The Black Eyed Peas earned three number-one singles during the year for "Boom Boom Pow", "I Gotta Feeling" and "Meet Me Halfway". Kesha's "Tik Tok" was longest-running number-one single in 2009, having topped the ARIA Singles Chart for eight consecutive weeks. Flo Rida's "Right Round", The Black Eyed Peas' "I Gotta Feeling", and Guetta's "Sexy Bitch" each spent seven weeks at the number-one spot.

## Chart history

Key :
* The yellow background indicates the #1 song on ARIA's End of Year Singles Chart of 2009.
| Date | Song | Artist(s) |
| 5 January | "Poker Face" | Lady Gaga |
| 12 January | "Poker Face" | Lady Gaga |
| 19 January | "Burn" | Jessica Mauboy |
| 26 January | "You Found Me" | The Fray |
| 2 February | "You Found Me" | The Fray |
| 9 February | "You Found Me" | The Fray |
| 16 February | "You Found Me" | The Fray |
| 23 February | "Right Round" | Flo Rida featuring Kesha |
| 2 March | "Right Round" | Flo Rida featuring Kesha |
| 9 March | "Right Round" | Flo Rida featuring Kesha |
| 16 March | "Right Round" | Flo Rida featuring Kesha |
| 23 March | "Love Story" | Taylor Swift |
| 30 March | "Right Round" | Flo Rida featuring Kesha |
| 6 April | "Love Story" | Taylor Swift |
| 13 April | "Right Round" | Flo Rida featuring Kesha |
| 20 April | "Right Round" | Flo Rida featuring Kesha |
| 27 April | "Jai Ho! (You Are My Destiny)" | A. R. Rahman and The Pussycat Dolls featuring Nicole Scherzinger |
| 4 May | "Jai Ho! (You Are My Destiny)" | A. R. Rahman and The Pussycat Dolls featuring Nicole Scherzinger |
| 11 May | "We Made You" | Eminem |
| 18 May | "Boom Boom Pow" | The Black Eyed Peas |
| 25 May | "Boom Boom Pow" | The Black Eyed Peas |
| 1 June | "Boom Boom Pow" | The Black Eyed Peas |
| 8 June | "Boom Boom Pow" | The Black Eyed Peas |
| 15 June | "Boom Boom Pow" | The Black Eyed Peas |
| 22 June | "Boom Boom Pow" | The Black Eyed Peas |
| 29 June | "I Gotta Feeling" | The Black Eyed Peas |
| 6 July | "I Gotta Feeling" | The Black Eyed Peas |
| 13 July | "I Gotta Feeling" | The Black Eyed Peas |
| 20 July | "I Gotta Feeling" | The Black Eyed Peas |
| 27 July | "I Gotta Feeling" | The Black Eyed Peas |
| 3 August | "I Gotta Feeling" | The Black Eyed Peas |
| 10 August | "I Gotta Feeling" | The Black Eyed Peas |
| 17 August | "Sexy Bitch" | David Guetta featuring Akon |
| 24 August | "Sexy Bitch" | David Guetta featuring Akon |
| 31 August | "Sexy Bitch" | David Guetta featuring Akon |
| 7 September | "Like It Like That" | Guy Sebastian |
| 14 September | "Like It Like That" | Guy Sebastian |
| 21 September | "Sexy Bitch" | David Guetta featuring Akon |
| 28 September | "Sexy Bitch" | David Guetta featuring Akon |
| 5 October | "Sexy Bitch" | David Guetta featuring Akon |
| 12 October | "Sexy Bitch" | David Guetta featuring Akon |
| 19 October | "This Is Who I Am" | Vanessa Amorosi |
| 26 October | "This Is Who I Am" | Vanessa Amorosi |
| 2 November | "Meet Me Halfway" | The Black Eyed Peas |
| 9 November | "Tik Tok" | Kesha |
| 16 November | "Tik Tok" | Kesha |
| 23 November | "Tik Tok" | Kesha |
| 30 November | "Tik Tok" | Kesha |
| 7 December | "Tik Tok" | Kesha |
| 14 December | "Tik Tok" | Kesha |
| 21 December | "Tik Tok" | Kesha |
| 28 December | "Tik Tok" | Kesha |

## Number-one artists

| Position | Artist | Weeks at No. 1 |
| 1 | Kesha | 15 |
| 2 | The Black Eyed Peas | 14 |
| 3 | Flo Rida | 7 |
| 3 | David Guetta | 7 |
| 3 | Akon (as featuring) | 7 |
| 4 | The Fray | 4 |
| 5 | Lady Gaga | 2 |
| 5 | Taylor Swift | 2 |
| 5 | A. R. Rahman | 2 |
| 5 | The Pussycat Dolls | 2 |
| 5 | Nicole Scherzinger (as featuring) | 2 |
| 5 | Guy Sebastian | 2 |
| 5 | Vanessa Amorosi | 2 |
| 6 | Jessica Mauboy | 1 |
| 6 | Eminem | 1 |