Justin Bieber

TMZ.comJustin Bieber -- Homecoming Party Busted Up by CopsTMZ.comThe second time -- around 12:40 A.M. -- there was noise ... we're told around 30-40 people were milling around Bieber's balcony. Cops knocked on the door, and spoke directly to Justin ... reminding him his neighbors could make a citizen's arrest if the ...