TMZ Complaint Dept. -- ATTACK OF THE BELIEBERS

The TMZ newsroom was FLOODED with thousands of calls from angry Beliebers -- who all seemed to be upset about the story we posted featuring their hero in his birthday suit.

They yelled ... they screamed ... some cried ... (and that was just our staff).

But the Beliebers were fired up too -- so we assembled some of our best producers and put them on the phones to address the concerns.

Ladies and gentlemen, we present ... THE TMZ COMPLAINT DEPARTMENT!!