KATY PERRY's cheeky summer anthem I KISSED A GIRL has scored a second week at the top of the U.S. pop charts.

The record keeps Leona Lewis, Lil Wayne and Rihanna off the top, while the Jonas Brothers pose a big threat - their new track Burnin' Up debuted at number five.

Meanwhile, Joe Jonas' duet with Demi Lovato on This Is Me creeps into the new Billboard top 10 at nine.