Justin Bieber performs his 'My World Tour' concert in Mexico City

Fans react as Canadian pop singer Justin Bieber performs during his "My World Tour" concert at the Foro Sol in Mexico City October 1, 2011. [Photo/Agencies]

Fans of Canadian pop singer Justin Bieber scream outside his hotel in Mexico City October 2, 2011. Bieber is performing two concerts in Mexico City as part of his "My World Tour." [Photo/Agencies]