Justin Bieber searching for hysterical fan

Justin Bieber is desperately pleading with his online followers to help him locate a young fan who missed out on tickets to his sold-out concert in Mexico.

The Baby hitmaker is due to play at Foro Sol in Mexico City on Saturday night (01Oct11), but dozens of devotees were left devastated when they lined up for tickets only to be told there were no more available.

After watching footage of one girl dropping to the floor and crying hysterically on hearing the news, Bieber took to his Twitter.com page to reach out to the youngster ahead of the show.

He posted a clip of news footage featuring the fan, alongside the words, "Need everyone's help. we have LESS than 24 hours. we need to find this girl... she is at the 30 sec (second) mark (in the clip). HELP! thanks."