First rule of selling Justin Bieber mecrh is to never call your client names right?

According to The Daily News, Bieber's marketing company is suing Wall Celebrity for $100,000 in damages after breaching a contract that forbid them to talk trash about the singer. Wall Celebrity, a merchandiser that sells vinyl wall copies of Justin's music was hit with the suit on Friday after company head Gianni Giannulli called Bieber an 'Idiot' online.

Looks like they have to put their money where their mouth is now.