<p>Pop star Justin Bieber poses for photos prior to a press conference at a hotel in Mexico City, Monday, June 11, 2012. Bieber will perform in a free open-air concert tonight at the Mexico City's main historic plaza, the Zocalo. (AP Photo/Alexandre Meneghini)</p>
June 12, 2012
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June 12, 2012 9:15 p.m.
Mexico City plaza jammed for Bieber
Mexico City plaza jammed for Bieber
MEXICO CITY - Thousands "tween" girls and their parents packed into Mexico City's historic main plaza Monday night, braving a light but incessant rain before a free concert by teen superstar Justin Bieber that was expected to draw 200,000 people.