Stranger's get into Bieber house

Two strange girls(twelve yer old) get into Bieber's glass house from thesmall opening of door on one girl's birthday . Justin Bieber was having a pool party in his house with some of his friends .Police was not called on this occasion  . Justin Bieber took phone from one of these girls and let them go.
after some days girls came and take their mobile back and leave.
Both girls were great fan of Bieber and they get into his house deliberately .