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She should be if this is true:

We know Justin admitted to cops that he was under the influence of prescription pills, alcohol and pot. Asked where he got to the meds, the Bieb reportedly admitted his mom was his supplier. He said they were anti-anxiety pills, but he didn't know what kind because he just takes whatever his momma gives him.

If it turns out the Bieb doesn't have a prescription for the drugs, his mother Pattie Mallette could be getting a visit from police.