Australian Idol winner Wes Carr has topped off last week's win with strong sales of his first single.
You, the first effort of the Bondi singer, has debuted at number three this week, behind last week's No.1, Poker Face, and the Kings Of Leon, who sit at No.2 and No.4 with Sex On Fire and Use Somebody.
Jessica Mauboy and Flo Rida have the only other Australian single in the charts - Running Back, which sits at No.7.
Britney Spears is down one spot to No.8 this week, while P!nk rounds out the top 10 with two songs - Sober and So What.
In the albums chart, Guns N' Roses' much anticipated Chinese Democracy has debuted at No.3.
The Killers' third studio album, Day & Age sits behind it at No.4, in front of Nickelback's Dark Horse.
AC/DC is the only Australian band in the top 10, at No.6, in front of the soundtrack of tween favourite High School Musical 3.
Enya and Beyonce round out the top 10 with And Winter Came and I Am ... Sasha Fierce respectively.
Australian singles chart
1(1) Poker Face - Lady GaGa (INR/UMA)
2(2) Sex On Fire - Kings Of Leon (RCA/SBME)
3(-) You - Wes Carr (SBME)
4(4) Use Somebody - Kings Of Leon (RCA/SBME)
5(5) Live Your Life - T.I. Feat. Rihanna (ATL/WAR)
6(3) If I Were A Boy - Beyonce (COL/SBME)
7(6) Running Back - Jessica Mauboy Feat. Flo Rida (SBME)
8(7) Womanizer - Britney Spears (JVE/SBME)
9(10) Sober - P!nk (LAF/SBME)
10(8) So What - P!nk (LAF/SBME)
Australian albums chart
1(1) Funhouse - P!nk (LAF/SBME)
2(2) Only By The Night - Kings Of Leon (RCA/SBME)
3(-) Chinese Democracy - Guns N' Roses (GEF/UMA)
4(-) Day & Age - The Killers (IUS/UMA)
5(3) Dark Horse - Nickelback (RR/WAR)
6(4) Black Ice AC/DC (ALB/SBME)
7(7) High School Musical 3: Senior Year - Soundtrack (WALT/EMI)
8(5) The Promise - Il Divo (SBME)
9(9) And Winter Came... - Enya (WEA/WAR)
10(8) I Am... Sasha Fierce - Beyonce (COL/SBME)