Music
Her debut single 'TiK ToK' notches up a fifth week atop the ARIA singles chart, forcing GaGa's 'Bad Romance' to settle for second position.
Australian Idol champion Stan Walker falls to three with his debut single 'Black Box', while Jay-Z and Alicia Keys climb to four with 'Empire State Of Mind'.
The only new track in the top ten comes from US R&B singer Jason Derulo, who jumps from eleven to seven with 'Whatcha Say'.
Meanwhile, Susan Boyle's I Dreamed A Dream racks up a third week at No.1 on the ARIA albums chart.
The top ten singles in full (click where possible for our reviews):
1. (1) Ke$ha: 'Tik Tok'
2. (3) Lady GaGa: 'Bad Romance'
3. (2) Stan Walker: 'Black Box'
4. (6) Jay-Z ft. Alicia Keys: 'Empire State Of Mind'
5. (4) Jay Sean feat Lil Wayne: 'Down'
6. (7) 30H!3 Feat Katy Perry: 'Starstrukk'
7. (11) Jason Derulo: 'Whatcha Say'
8. (10) Guy Sebastian ft. Jordin Sparks: 'Art Of Love'
9. (5) Black Eyed Peas: 'Meet Me Halfway'
10. (8) Orianthi: 'According To You'
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