Britney Spears concert duels with Miley Cyrus Which one will draw more fans in the West?

Is Miley Cyrus' idol Britney Spears playing catch-up to the Tween Queen?

Ms. Cyrus comes into the Staples Center on Tuesday. Britney follows the next night, on the 23rd. That night Miley will hold court in Anaheim at the Honda Center.

Miley plays Las Vegas' Thomas & Mack Center Saturday night. Britney plays Mandalay Bay the same night, plus Sunday night.

Which of the divas will win the bigger crowd in Los Angeles and Las Vegas? Box office total is unfair since Britney's tickets are almost three times of Miley's cost.