Mexico City's main plaza jammed for Bieber concert

MEXICO CITY (AP) — Thousands of “tween” girls jammed a vast square with their parents and screamed in unison throughout teen superstar Justin Bieber’s free concert Monday night, an event that was expected to draw 200,000 people to the historic center of Mexico’s capital.

Bieber opened with his hit song “Baby,” while his adoring fans filling the city’s main plaza sang along or shouted “Justin! Justin! Justin!”