Metro Station might give US singer Katy Perry a run for her money on next week’s ARIA chart as the single (both physically and digitally) ambles it’s way up the charts. But for now, Katy’s on top of the Aussie singles chart for the fifth consecutive week. Jason Mraz has entered the Aussie top ten at number ten, becoming his first ever chart hit in Australia. Dance act The Potbelleez have raced into the top 20 (No.15) and Central Station Records would be happy with a top 20 placing for September’s dance hit ‘Cry For You’ (No.19) which also debuts at No.14 on the physical singles chart. Teen star Miley Cyrus has debuted at No.38 with ‘7 Things’. Metro Station takes the number one position over on the digital track charts, with The Veronicas’ new single ‘Take Me On The Floor’ pOpping in at No.22 and bizarrely, Roxette’s ‘Dangerous’ debuting at No.30. Meanwhile, Alex Gaudino’s dance single ‘Watch Out’, featuring the vocals of Shena, debuts at No.38 on the physical singles chart. And over on the albums chart, the Mamma Mia soundtrack olds strong at No.1, Jason Mraz scores his first top ten Aussie album, Katy Perry pOps in at No.12 and there are chart drops (one of them large) for The Presets, Gabriella Cilmi, Sam Sparro, Duffy, Amy Winehouse and Vanessa Amorosi.