All eyes on the center ring! Britney Spears is celebrating her 27th birthday and releasing her sixth studio album "Circus!" In honor of the release, the pop star showed off her midriff during her performing on "Good Morning America."

But that's not all -- Brit's week is full of birthday surprises! To top off the cake, Spears has unveiled twenty new North American tour dates for her 2009 world tour.

The pop mom will kickoff the craziness in New Orleans on March 3, 2009.