Apparently, the train hasn’t derailed yet.

Britney Spears today announced an additional 20 dates to her “Circus” tour, which stopped at the Verizon Center in D.C. in March. The $50 million production is the highest-grossing tour of 2009 (so far – just wait until the U2 jaunt begins).

If you missed the Spears spectacle there – or just can’t get enough Brit – you’ll have to travel a little further to see her on this round of dates, but hey, they’re all drive-able.

Aug. 24-25: New York (Madison Square Garden)
Aug. 30: Philadelphia (Wachovia Center)
Sept. 5: Greensboro, N.C. (Greensboro Coliseum)

Tickets to all of the new dates will go on sale June 19.