Britney Stays Up Late

Pop’s reigning comeback princess Britney Spears will appear on the Late Show with David Letterman tonight to deliver the Top 10 List.

It will be Spears’ first appearance on the show post-meltdown…uhh…I mean, in nearly three years.

The entertainer will kick off the second American leg of her successful “Circus Tour” on Aug. 20.

Photo: People.com.

Update: You go girl, with your bad bikinid self!