10/31/2008 at 06:30 PM EDT
revealed the sexy cover photo for her new album Friday – plus the next single, called "Circus."
"The song is an up-tempo track," says the 26-year-old pop singer's official Web site
. "It's gonna be absolutely crazy! "
The CD, which has already produced the hit "Womanizer," arrives in stores Dec. 2. – Mike Fleeman