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The ``Baby`` hitmaker is currently touring South America and is staying in Argentina ahead of his show at the River Plate Stadium in Buenos Aires on Thursday.
Hundreds of young devotees discovered where Bieber was and flocked to the hotel - and scenes of chaos were screened on local TV news stations as fans tried to gain access to the building, reported Contactmusic.
The teen singer saw the footage, and took to his Twitter page to write, "My Fans go Hard!! ha. Epicfans !!! wait... but dont break into my room. that aint cool. this is still epic (sic)."